Postage stamps of the United States : an illustrated description of all United States postage and special service stamps issued by the Post Office Department from July 1, 1847, to December 31, 1967 - United States. Post Office Dept. Office of Special Assistant to the Postmaster General (Washington : U.S. G.P.O., 1968)
Includes index.
Cover title: United States postage stamps, 1847-1967.
Mode of access: Internet.
Keywords: Postage stamps -- United States -- History; Postage stamps -- United States -- Catalogs