SPECIAL COLLECTIONS Philadelphia. National Philatelic Museum. “SCG United States Stamp Exhibition, September 2h- .P9L9 October 15, 199. Philadelphia, National Phila- .P53M telic Museum, 1949.
Well 64p. illus. 23cm. (Its Official bulletin, no.l0 v.1,no.10)
1. Postage-stamps--U.S.--Exhibitions.