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SPECIAL
COLLECTIONS Philadelphia. National Philatelic Museum.
~ScG Pan-American Stamp Exhibition, April 9th to »P9L9 May 13th [1949]. Philadelphia, Philatelic Muse- .P53M um [1949]
Wied 55p. illus. 23cm. (Its Official bulletin, no.4 v.l,no.4)
 
1. Postage-stamps--Latin-America--Exhibitions. Le Teles MB