Philatelic Resources
Philatelic Organizations
American Philatelic Society
American Topical Association
American Revenue Association
U.S. Philatelic Classics Society
Allied Military Government Collectors' Club
Civil War Philatelic Society
Germany & Colonies Philatelic Society
Germany Philatelic Society
Topical Philately
American Philatelic Research Library
United Postal Stationery Society
The United States Stamp Society
Specialized Sites
CSA Counterfeits Website
Kevin Baker's page on distinguishing forgeries of the stamps of the Confederate States
Video Resources
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Exploring Stamps YouTube page
Exhibiting
Online Exhibits
Periodicals
Stamp Dealers*
Stamps2Go
Hip Stamp
eBay

See also the dealers list on the Anuual Stamp Show page
* NPS makes no representations for any specific dealers