The product is the attached list, which contains descriptions, publishing data and Library of Congress call numbers for about 1500 relatively obtainable, single-artist raisonnes. You may also request MAC-compatible or other formats by email. The supplement to the Riggs catalogue is searchable online at the Print Council of America site. Online Catalog 2. Once you have identified the resource that you need, contact your local library with call numbers and descriptions.
Most library staffs are extremely helpful in finding volumes or in directing the search.
If you'd rather purchase the catalogue raisonne, you're likely to find it on the web. To analyze value in light of past auction prices, you might try a free online search of auction data at icollector . Their database is extensive and their format is easy to use. Subscription databases, such as Gordon's and Artnet , provide more complete online searches of auction data for a fee. For offline searches, you might want to purchase Gordon's Print Price Annual , available at the Gordon's website , or find Gordon's in your local library.