Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL United States. Congress. House. Committee on Government Operations. Legislation and National Security Subcommittee,"Implementation of international government procurement agreements and the Buy American Act of 1988 : hearing before the Legislation and National Security Subcommittee of the Committee on Government Operations, House of Representatives, One Hundred First Congress, first session, September 27, 1989",,Congressional Information Service,2000,"U.S. Congressional Committee Publications on GATT & WTO, 1949-1999",,,,https://cir.nii.ac.jp/crid/1130282270364633344