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COLLEcTIo “$niladelphia. National Philatelic Museum.
~soG 1953 Topex; second A.T.A. International Con- -P9L9 vention and Stamp Exhibition, under the auspices -F53M of the American Topical Association, National Wield Philatelic Museum [C&1] the A.T.A. Philadelphia
no.2 Chapter 6. Philadelphia, National Philatelic Museum, 1953. C111]-142p. illus. 23cm. (Its Official bul- letin, v.5,no.2)
1. Postage-stamps—-Topics--Exhibitions.
I. American “so . MB