The Issuance of Semipostal Stamps by the U.S. Postal Service: Hearing Before the International Security, Proliferation, and Federal Services Subcommittee of the Committee on Governmental Affairs, United States Senate, One Hundred Sixth Congress, Second Session, May 25, 2000
United States. Congress. Senate. Committee on Governmental Affairs. Subcommittee on International Security, Proliferation, and Federal Services
Free