著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL United States. Congress. House. Committee on Government Operations. Legislation and National Security Subcommittee,"Government Procurement Agreements Act of 1990; Reciprocity in International Government Procurement Enforcement Act of 1990 : hearing before the Legislation and National Security Subcommittee of the Committee on Government Operations, House of Representatives, One Hundred First Congress, second session, on H.R. 5023, to require that certain agreements entered into by executive agencies for procurement outside of the United States be for a fixed term and for other purposes, and H.R. 5439, to amend the act of March 3, 1933 (Commonly known as the buy American act), to require the approval of the United States trade representative in order for the head of a federak agency to waive the buy american act, and for other purposes, September 13, 1990",,Congressional Information Service,2000,"U.S. Congressional Committee Publications on GATT & WTO, 1949-1999",,,,https://cir.nii.ac.jp/crid/1130282271971589504