Biophilately Index Volumes 1-63 with Unit History “The Mother of All Indexes”
Organizations:
- American Topical Association
- American Philatelic Society
- U.S. Postal Museum
- Royal Philatelic Society – Canada
- Royal Philatelic Society – London
- American Assocication of Philatelic Exhibitors
Topical Collecting:
General:
- Stamps on the Web The philately portal of the Associazione Italiana Collezionisti Posta Militare e Storia Postale
- 2-clicks Stamps
- Stamp Collecting: At Home Hobbies
- A Beginner’s Resource Guide to Philately
- History of the Postcard
- Beginner’s Guide