- American Philatelic C3a Online Learning Site – https://stamps.org/learn/c3a-online-learning
- American Philatelic Society | Getting Started – https://stamps.org/learn/getting-started
- American Philatelic Research Library – https://stamps.org/services/library
- American Philatelic Society | Learn About Stamps & Postal History – https://stamps.org/learn
- American Topical Association (ATA) Books – https://americantopical.org/store
- American Topical Association (ATA) Online Classes – https://americantopical.org/ATA-Online-Classes
- ESPER History of Stamps – https://www.esperstamps.org/history-of-stamps
- Mystic Stamp Company – Stamping Learning Center
https://info.mysticstamp.com/learn/
- Philately LibGuide by Jeanette (Claire) Sewell – https://libguides.rice.edu/philately
- Postal Museum Beginner’s Guide to Stamp Collecting – https://www.postalmuseum.org/blog/beginners-guide-to-stamp-collecting/
- Stanley Gibbons’ – A Guide to Stamp Collecting
https://www.stanleygibbons.com/collecting-stamps/new-stamps
Thanks for visiting SOSC, (pronounced "so-sh") and stands for State of Stamp Collecting. Here I showcase postage stamps and postal-related material with special emphasis on USA Philatelic Catalog, US first day covers, Black culture, technology, art and space.
State of Stamp Collecting 