Official catalogue.
Contributors: National Philatelic Exhibitions of Washington, D.C., inc.
Publisher: National Philatelic Exhibitions of Washington, D.C.
Published: 1966
Place of publication: [Washington
Language: eng
Number of pages: 196
Subjects: Postage stamps -- Catalogs.
Notes: Catalogue of an exhibition (known also by its acronym, SIPEX) held May 21-30, 1966.
Sponsored by the National Philatelic Exhibitions of Washington, D.C.