. SPECIAL COLLECTIONS American Philatelic Society. Convention, 1972 *SCG (fall), New Haven, Conn. -P972 Sonex '72, American Philatelic Society fall -Am2S convention, September 14-17, 1972, New Haven, Connecticut. CNew Haven, 1972] lv.(unpaged) illus. 23cm.
1. Postage-stamps--Exhibitions.
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