nyuuzyou/wikis huggingface dataset:
Wet process fiberboard

== Description ==
A process for forming hardboards patented by Masonite Corporation in 1928 (see also Masonite®). In the wet process, wood fibers are broken apart and distributed with steam and water baths. The fibers are compressed on a screen then heated to form a very dense, rigid sheet. The natural lignin from the wood fibers acts as a cement to give the board sufficient strength with no additional adhesives. Hardboards range from a dark brown to a light tan in color and have one very smooth surface; the reverse side has a wire screen impression. 
See also dry process fiberboard.
== Synonyms and Related Terms ==
Aglomerado de fibras obtido por via húmida (Port.)
== Resources and Citations ==
* C. Gould, K. Konrad, K. Milley, R. Gallagher, "Fiberboard", in Twentieth-Century Building Materials, T. Jester (ed.), McGraw-Hill: New York, 1995.
* Pam Hatchfield, Pollutants in the Museum Environment, Archetype Press, London, 2002
* Thomas C. Jester (ed.), Twentieth-Century Building Materials, McGraw-Hill Companies, Washington DC, 1995
Category:Materials database
Wettability

== Description ==
The ability of a solid material to have surface contact with a liquid. Wettability is measured, as with surface tension, by the contact angle formed between a drop of the liquid and the material. A hydrophobic material will have a high contact angle (usually greater than 90 degrees) and a completely wettable material such as unsized paper will have a contact angle of zero. Wetting agents increase the wettability of a material.
== Synonyms and Related Terms ==
Benetzbarkeit (Deut.); mouillabilité (Fr.); wetting ability
==Resources and Citations==
* Theodore J. Reinhart, 'Glossary of Terms', Engineered Plastics, ASM International, 1988
* Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
Category:Materials database
Wetting agent

== Description ==
A component added to a liquid to decrease its surface tension and thus increase its ability to wet, or spread, over a solid surface. Wetting agents are often added to watercolor paints and photographic film developing solutions. Examples of wetting agents are: Surfactants, Soaps, Alcohols, gum arabic, oxgall, Fatty acids.
== Resources and Citations ==
* R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 866
* Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* Richard C. Wolbers, Nanette T. Sterman, Chris Stavroudis, Notes for Workshop on New Methods in the Cleaning of Paintings, J.Paul Getty Trust, Los Angeles, 1990
* Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
* Bernard Toale, The Art of Papermaking, Davis Publications, Portland OR, 1983
* Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
* Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000
Category:Materials database
Whale oil

== Description ==
A yellowish oil obtained from the blubber of whales (order Cetacea, such as Balaena mysticetus). Whale oil was extracted from the blubber with steam. It is composed of the glycerides of fatty acids: oleic (35.2%), stearic (2.8%), palmitic (15.6%), myristic (9.3%), palmitoleic (14.4%) and others. At one time whale oil was used for manufacturing soaps, candles, and as a lubricant for textile spinning machines. The smoky, odorous oil was considered an inferior source of lighting fuel. It has since been superseded by synthetic oils.
== Synonyms and Related Terms ==
sperm oil; sod oil
== Physical and Chemical Properties ==
* Saponification no. = 180-197 
* Iodine no. = 105-135
* Density = 0.920-0.927 g/ml
* Refractive Index = 1.460
==Resources and Citations==
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 867
* Encyclopedia Britannica, http://www.britannica.com Comment: "whale." Accessed 20 Oct. 2004 .
* CRC Handbook of Chemistry and Physics, Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: density=0.892, refl index=1.460, iodine value=120, saponification value=195, lauric acid=0.2%, myristic acid=9.3%, palmitic acid=15.6%, stearic acid=2.8%, palmitoleic acid-14.4%, oleic acid=35.2%
* Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
* Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
* The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
Category:Materials database
Wheat

== Description ==
A cereal grass (genus Triticum) that has been cultivated for food since prehistoric times. Wheat is grown worldwide in temperate regions. The tall stalks (about 1 m) have heads of grain that are primarily ground into flour for pasta, and bread. Wheat grain is also used for making starch, alcohol (beer), and feeding livestock. It contains carbohydrates (70%), and proteins (11-15%) with smaller amounts of minerals and vitamins. The wheat stalks, or straw, are used for fodder, papermaking, and bedding.
== Synonyms and Related Terms ==
wheat straw
==Physical and Chemical Properties==
For paper fiber characteristics see straw.
== Additional Images ==
File:wheatfieldwp2.jpg|thumb|Wheat harvest
File:Wheat_bundle_USDA_ARS.jpg|thumb|Bundle of wheat
File:Wheat_det_USDA_ARS.jpg|Wheat grain
File:wheat_straw_proc_det.jpg|Wheat straw
== Resources and Citations ==
* The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
* Encyclopedia Britannica, http://www.britannica.com Comment: "wheat." Accessed: 26 Oct. 2004 .
Category:Materials database
Wheat flour

== Description ==
A fine, white powder obtained from grinding seeds of cereal grasses of the genus Triticum. Wheat flour is primarily used for food products. It contains starch and glutenous proteins. It will form a thick, viscous paste with boiling water that, once dried, is strong and water-insoluble. Wheat flour paste has historically been used as a size for textiles and as a paste for relining and hinging. It is no longer in used in conservation because it is susceptible to attack by microorganisms and because it can only be removed with the aid of enzymes.
== Synonyms and Related Terms ==
wheat paste; harina de trigo (Esp.); farine de blé (Fr.); farina di grano (It
==Physical and Chemical Properties==
* Flour paste contains both starch and gluten (proteins). 
* Starch paste contains only starch.
==Resources and Citations==
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 868
* Hermann Kuhn, Conservation and Restoration of Works of Art and Antiquities, Butterworths, London, 1986
* Book and Paper Group, Paper Conservation Catalog, AIC, 1984, 1989
Category:Materials database
Wheat starch

== Description ==
Polysaccharide granules that compose about 70% of wheat flour. Wheat starch is separated from the gluten and fibrous particles by sieving then wash flotation. It is composed of 18-27% amylose. When heated with water, wheat starch forms a low viscosity solution that does not change with heating time. It thickens substantially on cooling and to form an opaque gel. Wheat starch dries to form a strong bond. It is susceptible to biological attack and may turn gray or yellow with age. Wheat starch paste is the primary adhesive used by paper conservators for hinging, mending, lining ,and reinforcement (AIC Book and Paper Catalog).
== Synonyms and Related Terms ==
wheat starch paste; almidón de trigo (Esp.); amidon de blé (Fr.); amido di grano (It) 
Examples include: Aytex P [Henkel]; Starbake starch [Hercules]; Paygel [General Mills]; Sin-nori; Jin-Shofu
[[[SliderGallery rightalign|Wheat starch.TIF~FTIR (MFA)]]]
== Applications ==
* Hinging
* Gluing
* Adhering paper-based products
== Risks ==
* Susceptible to biodeterioration. 
* Dried films become brittle with age.
* BioSynth: SDS
== Physical and Chemical Properties ==
* Fine oval shaped granules. Granule size = 3 - 35 micrometers 
* Gelatinization temperature = 58 - 64 C 
* Turns blue-violet with iodine.
Microscopic identification: in a dispersed sample, wheat starch particles are colorless and rounded to oval-shaped with a broad particle size distribution from fine to coarse. Under crossed polarized light, birefringence is low with first-order grays and whites observed, and an extinction cross is visible which is sometimes distorted from the center. The shape of this extinction cross can be used to distinguish wheat from other starches (potato, maize).
== Additional Images ==
File:1_Wheat_starch_200XS.jpg|Wheat starch at 200x
File:1_Wheat_starch_200XS_pol.jpg|Wheat starch at 200x Polarized
File:PLM Wheat Starch Grains Reference PPL 400x.jpg|Wheat starch, PPL, 400x
File:PLM Wheat Starch Grains Reference XPL 400x.jpg|Wheat starch, XPL, 400x
File:PLM starch particle with lake PPL 400x.jpg|Wheat starch used as base for organic red lake, PPL, 400x
File:PLM2 starch particle with lake XPL 400x.jpg|Wheat starch used as base for organic red lake, XPL, 400x
==Resources and Citations==
* Rachael Perkins Arenstein, Lisa Goldberg, and Eugenie Milroy, ‘Support and Rehousing for Collection Storage’ In ‘Preventive Conservation: Collection Storage’ Lisa Elkin and Christopher A. Norris (eds.), Society for the Preservation of Natural History Collections, New York. 2019. 
* Book and Paper Group, Paper Conservation Catalog, AIC, 1984, 1989
* Jane Down, Adhesive projects at the Canadian Conservation Institute, Preprints of the SSCR's 2nd Resins Conference, Sept. 1995, Scottish Society for Conservation & Restoration, Edinburgh
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 768
* Conservation Support Systems, Catalog, 1997
* Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000
Category:Materials database
Whelk

== Description ==
A large spiral-shelled marine gastropod of the family Buccinidae. Whelk is also an archaic name for a red dye obtained from these mollusks. The dye is also called Tyrian purple.
== Synonyms and Related Terms ==
Tyrian purple; red whelk; Nucella lapillus minchas (Esp.); Purpura patula caracolillo (Esp.); buccin (Fr.);
==Resources and Citations==
* Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
* Susan E. Schur, Conservation Terminology: A review of Past & Current Nomenclature of Materials, Technology and Conservation, Spring (p.34-39); Summer (p.35-38); Fall (p.25-36), 1985
* Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
* The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
Category:Materials database
Whetstone

== Description ==
A hard, fine-grain, abrasive stone used to hone tools and blades. Whetstones are usually composed of chalcedony, silica, or sandstone. Artificial whetstones are made with Alundum® or Carborundum. Whetstones are sometimes oiled before use and, hence, called oilstones.
== Synonyms and Related Terms ==
oilstone; snakestone; honestone; rubbing stones; sharpening stone; coticule, Ayr stone; Ouchita stone (from the Ouchita Mountains in Arkansas); Scheifstein (Deut.); wetsteen (Ned.)
== Comparisons ==
== Resources and Citations ==
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 869
* Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
* Wikipedia: http://en.wikipedia.org/wiki/Whetstone_%28tool%29 (Accessed Sept. 20, 2005)
* Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
* The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
Category:Materials database
Whewellite

== Description ==
A white to colorless mineral composed of calcium oxalate monohydrate. Whewellite is formed on the surface of marble and limestone due to the presence of microorganisms, such as lichen.
== Synonyms and Related Terms ==
calcium oxalate monohydrate; calcium salt of ethanedioic acid; wewelita (Esp.); whewelite (Port.); Whewellit (Deut.)
[[[SliderGallery rightalign|Whewellite IR-ATR RRUFF R050526.png~IR-ATR (RRUFF)|Whewellite Raman RRUFF R050526.png~Raman (RRUFF)|whewellite.jpg~Chemical structure]]]
== Risks ==
* Fisher Scientific: MSDS
==Physical and Chemical Properties==
* Soluble in dilute mineral acids. Insoluble in water, acetic acid. 
* Slightly hygroscopic. 
* Transparent to translucent tabular crystals with good cleavage in all three planes.
* Luster=vitreous to pearly. 
* Streak = white. 
* Fluorescent in UV light.
Composition 	Ca(C2O4)-H2O
CAS 	5794-28-5
Mohs Hardness 	2.5-3.0
Density 	2.2 g/ml
Molecular Weight	mol. wt. = 146.11
==Resources and Citations==
* Mineralogy Database: Whewellite
* M. del Monte, C. Sabbioni, G.Zappia. The origin of calcium oxalates on historical buildings, monuments and natural outcrops. The science of the total environment 67, (1987), pp. 17-39 
* B. Ford, I.MacLeod, P.Haydock, "Rock art pigments from Kimberley region of Western Australia: identification of the minerals and conversion mechanisms." Studies in conservation 39, no. 1 (1994), pp. 57-69
* Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
* Wikipedia,: http://en.wikipedia.org/wiki/Whewellite (Accessed Nov. 29, 2005)
Category:Materials database
Whey

== Description ==
The liquid remaining after milk solids (fat and casein) are removed. Dried whey contains about 13% protein, 71% lactose, 2.3% lactic acid, 4.5% water, and 8% ash. Whey is an inexpensive byproduct of cheese making. Whey is used as a source for lactose, an animal feed, and as an additive in rigid polyurethane foams.
== Synonyms and Related Terms ==
suero (Esp.)
==Resources and Citations==
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 152
* The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
* Encyclopedia Britannica, http://www.britannica.com Comment: "whey." Accessed 28 Oct. 2004 .
Category:Materials database
Whinstone

== Description ==
A British name for any dark-color, fine-grain rock, such as basalt, chert, diabase, dolorite, spidiorite, greenstone, and lamprophyre.
== Synonyms and Related Terms ==
greenstone; toadstone; trap; basalt; chert; diabase; dolorite; spidiorite; lamprophyres
==Resources and Citations==
* Susan E. Schur, Conservation Terminology: A review of Past & Current Nomenclature of Materials, Technology and Conservation, Spring (p.34-39); Summer (p.35-38); Fall (p.25-36), 1985
* Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
* The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
Category:Materials database
Whipcord

== Description ==
A round, twisted cord or a twill fabric with a clearly defined diagonal ribs. Whipcord fabrics, made from cotton or wool, are typically used in upholstery, sportswear, or uniforms. Whipcord ropes were used to make whiplashes.
==Resources and Citations==
* Fairchild's Dictionary of Textiles, Phyllis G.Tortora, Robert S. Merkel (eds.), Fairchild Publications, New York City, 7th edition, 1996
* The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
* Website: www.fabrics.net
Category:Materials database
Whisker

== Description ==
(Chemistry) A short filament or crystalline fiber often grown from vapor or electrical deposition. Boron whiskers are used for reinforcement and heat resistance in fabrics and ceramics.
==Resources and Citations==
* Theodore J. Reinhart, 'Glossary of Terms', Engineered Plastics, ASM International, 1988
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
* The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
Category:Materials database
White

== Description ==
White is the visual perception by a human eye obtained by a continuous visible light spectrum.
== Synonyms and related terms ==
hvid (Dan.); Weiss (Deut.); blanco (Esp.); blanc (Fr.); leuko (Gr.); bianco (It.); wit (Ned.); biało (Pol.); branco (Port.); vit (Sven.); colour
Category:Materials database
White acid

== Description ==
A mixture of ammonium bifluoride and hydrogen fluoride. White acid is used for etching glass.
==Resources and Citations==
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 299
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
Category:Materials database
White arsenic

== Description ==
An archaic name for arsenic trioxide.
== Synonyms and Related Terms ==
white alum; arsenic trioxide
==Resources and Citations==
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 69
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* Susan E. Schur, Conservation Terminology: A review of Past & Current Nomenclature of Materials, Technology and Conservation, Spring (p.34-39); Summer (p.35-38); Fall (p.25-36), 1985
Category:Materials database
White ash

== Description ==
A deciduous tree (Fraxinus americana) native to the eastern and central parts of the U.S. and Canada. White ash produces a whitish, lightweight wood that is stiff, strong, and resilient. It is primarily used for sports equipment (baseball bats, hockey sticks, paddles and oars, and tennis racket frames), and tools (handles of shovels, hammers, spades, hoes, and rakes as well as ladder rungs).
== Synonyms and Related Terms ==
Fraxinus americana; American ash; Canadian ash; Weiß-Esche (Deut.)
==Physical and Chemical Properties==
* Tall tree growing to 35 m with narrow oval crown. 
* Bark=ashy gray to brown with interlacing diamond shade ridges. 
* Leaves=compound with 7 serrated, ovate leaflets; total length=20-30 cm. 
* Fruit=winged samara with long, slender seed.
* Density = 45-58 ppcf
* Heartwood is light to medium brown; Sapwood is beige or light brown and tends to be very wide
* Grain is straight wand regular; texture is medium to coarse
== Working Properties==
* Good results with hand or machine tools. 
* Responds well to steam bending. 
* Glues, stains, and finishes well.
==Resources and Citations==
* The Wood Database: White ash
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 74
* F. H. Titmuss, Commercial Timbers of the World, The Technical Press Ltd., London, 1965
* Edward Reich, Carlton J. Siegler, Consumer Goods: How to Know and Use Them, American Book Company, New York City, 1937
* Virginia Tech Dendrology website at www.fw.vt.edu/dendro/dendrology/main.htm (Accessed Dec. 9, 2005)
* Wikipedia: http://en.wikipedia.org/wiki/White_Ash (Accessed Dec. 9, 2005)
* Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
* Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
Category:Materials database
White birch

== Description ==
Any of several white-barked birch trees, such as Betula papyrifera and Betula alba, native to northeastern North America or Betula pendula and Betula pubescens, native to Europe. White birch produces a light colored hardwood that is tough, flexible and naturally waterproof. It used for interior trim, millwork and small items such as spools, bobbins, handles and toys. A red dye was produced by native Americans by boiling the bark from the white birch with ashes of cedar bark.
== Synonyms and Related Terms ==
paper birch (Betula papyrifera); white birch (Betula alba); silver birch (Betula pendula); European white birch (Betula pubescens); abedul (Esp.)
==Physical and Chemical Properties==
* Heartwood is light reddish brown: Sapwood is nearly white
* Grain is straight to slightly wavy; Texture is fine and even with a low natural luster
==Working Properties== 
* Easy to work with hand and machine tools, though boards with wild grain can cause grain tearout during machining operations. 
* Turns, glues, and finishes well.
==Resources and Citations==
* The wood Database: Silver Birch
* Schoch, W., Heller, I., Schweingruber, F.H., Kienast, F., 2004:Wood anatomy of central European Species: Common Birch, White Birch,Betula alba (B. pendula / B. pubescens)
* R.J. Adrosko, Natural Dyes in the United States, Smithsonian Institution Press, Washington, DC, 1968
* Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
* Edward Reich, Carlton J. Siegler, Consumer Goods: How to Know and Use Them, American Book Company, New York City, 1937
* Website : http://www1.umn.edu/ships/scimath/dyes2.htm#History
* Wikipedia: http://en.wikipedia.org/wiki/White_Birch (Accessed Oct. 3, 2005)
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971
* Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
* The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
Category:Materials database
White brass

== Description ==
1) A silvery white alloy composed of 20-35% copper and 65-80% zinc. White brass is used for inexpensive jewelry and small cast items, such as buttons. It has also been called Birmingham platina and white tombac. These high zinc brasses are not malleable
2) A type of nickel silver alloy containing 50-60% copper, 20-30% nickel, and 20% zinc. White brass, or white copper, is used as a base metal for plated silverware as well as for corrosion resistant white castings, such as plaques and hardware. 
3. An alloy composed of 65% tin, 28-30% zinc, and 3-6% copper. White brass is a hard, dense alloy that is used for automobile bearings (Brady 1971).
== Synonyms and Related Terms ==
1: Birmingham platina; white tombac 
2: white copper; white nickel brass; laiton blanc (Fr.); Weißmessing (Deut.); latão branco (Port.)
==Resources and Citations==
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 869
* Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
* Encyclopedia Britannica, http://www.britannica.com Comment: "copper processing." Accessed 28 Oct. 2004 .
Category:Materials database
White bronze

== Description ==
A silvery color bronze composed of copper mixed with high amounts of tin (up to 20%) or aluminum (up to 10%). White bronze can be brittle and unworkable. It is usually powdered for use in stencils and paints. Some cast items, such as the Tara brooch (8th century Dublin), have been made from the alloy.
== Synonyms and Related Terms ==
bronze blanc (Fr;); bronze branco (Port.)
==Resources and Citations==
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 122
* Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
* Encyclopedia Britannica, http://www.britannica.com Comment: "Tara brooch." Accessed 19 Oct. 2004 .
Category:Materials database