Scott Stamp Catalogs
Recently issued the 2000 series.

Century Stamps
Recently issued the Special 20th Anniversary Edition U.S. Catalog.[3,316 stamp images in 156 pages].

Michel Catalogs
Specializes in German and European Issues. Lighthouse also publishes American and Overseas catalogs.

Minkus Catalogs
Minkus Catalogs and albums. See also New Minkus 1998 USA Standard Catalog

Stamp Yellow Pages Directory
An alphabetical listing of stamp catalogs available on the World Wide Web.

Stanley Gibbons
Publishes the Stanley Gibbons annual catalogs as well as International Stamps and Exhibition News.