The American Numismatic Society in New York
212-234-3130; www.amnumsoc.org

Eastern Numismatics Inc.
1-800-835-0008; www.uscoins.com

The Industry Counsel for Tangible Assets
410-626-7005; www.ictaonline.org

The Whitman Coin Guide to Coin Collecting by Kenneth Bressett 
(St. Martin's Press, $11.95)

World of Coins and Coin Collecting by David L. Ganz 
(Bonus Books, $29.95)