Abstract This is a collection of commemorative material for various American and Soviet manned spaceflight programs, including Apollo, Soyuz, Vostock, and Skylab missions. It is chiefly a collection of photographic prints, magazine clippings, and correspondence, with some photos and letters signed by astronauts and/or cosmonauts. Each collection is accompanied by philatelic material, including first day covers, individual stamps, and souvenir sheets and/or blocks. Contents were originally arranged in...