Relo

An relo in usa nga butang nga nahatag hin oras.

Pinanbasaran

Bibliograpiya
 Baillie, G.H., O. Clutton, & C.A. Ilbert. Britten’s Old Clocks and Watches and Their Makers (7th ed.). Bonanza Books (1956).
 Bolter, David J. Turing's Man: Western Culture in the Computer Age. The University of North Carolina Press, Chapel Hill, N.C. (1984). ISBN 0-8078-4108-0 pbk. Very good, readable summary of the role of "the clock" in its setting the direction of philosophic movement for the "Western World". Cf. picture on p. 25 showing the verge and foliot. Bolton derived the picture from Macey, p. 20.
 

 Edey, Winthrop. French Clocks. New York: Walker & Co. (1967).
 Kak, Subhash, Babylonian and Indian Astronomy: Early Connections. February 17, 2003.
 Kumar, Narendra "Science in Ancient India" (2004). ISBN 81-261-2056-8.
 Landes, David S. Revolution in Time: Clocks and the Making of the Modern World. Cambridge: Harvard University Press (1983).
 Landes, David S. Clocks & the Wealth of Nations, Daedalus Journal, Spring 2003.
 Lloyd, Alan H. “Mechanical Timekeepers”, A History of Technology, Vol. III. Edited by Charles Joseph Singer et al. Oxford: Clarendon Press (1957), pp. 648–675.
 Macey, Samuel L., Clocks and the Cosmos: Time in Western Life and Thought, Archon Books, Hamden, Conn. (1980).

 North, John. God's Clockmaker: Richard of Wallingford and the Invention of Time. London: Hambledon and London (2005).
 Palmer, Brooks. The Book of American Clocks, The Macmillan Co. (1979).
 Robinson, Tom. The Longcase Clock. Suffolk, England: Antique Collector’s Club (1981).
 Smith, Alan. The International Dictionary of Clocks. London: Chancellor Press (1996).
 Tardy. French Clocks the World Over. Part I and II. Translated with the assistance of Alexander Ballantyne. Paris: Tardy (1981).
 Yoder, Joella Gerstmeyer. Unrolling Time: Christiaan Huygens and the Mathematization of Nature. New York: Cambridge University Press (1988).
 Zea, Philip, & Robert Cheney. Clock Making in New England: 1725–1825. Old Sturbridge Village (1992).

Mga sumpay ha gawas

 American Watchmakers-Clockmakers Institute
 History of the Antique longcase clock 
 National Association of Watch & Clock Collectors Museum
 Article, by a key figure in the development of quartz crystal clocks, on the history of timekeeping up to the late 1940s from The Bell System Technical Journal, Vol. XXVII, pp. 510-588, 1948 
 Information on Dutch clocks 
 Information on Black Forest Horology 
 Science Museum - Time Measurement 
 Greenwich Mean Time (GMT) - time from Internet (with zones)