SPECIAL
COLLECTIONS
*scG ~P9KO .P53M vee
no.7
Philadelphia. National Philatelic Museum.
1950 International Airpost Exhibition, Septem- ber 16th-October 11th 1950 at National Philatelic Museum; under the auspices of American Air Mail Society and National Philatelic Museum. Phila- delphia, National Philatelic Museum, 1950.
775-950p. illus. 23cm. (Its Official bulle- tin, v.2,no.7)
1. Air-mail stamps--Exhibitions. 2. Air mail service--History. I. American Air Mail Society.
MB