Humane treatment of animals used in research: hearings before a Subcommittee of the Committee on Interstate and Foreign Commerce, House of Representatives, Eighty-seventh Congress, second session, on H.R. 1937 a bill to provide for the humane treatment of animals used in experiments and tests by recipients of grants from the United States and by agencies and instrumentalities of the U.S. government and for other purposes ; H.R. 3556 a bill to provide for the humane treatment of animals used in experiment and research by recipients of grants from the United States, and by agencies and instrumentalities of the United States, and for other purposes. September 28 and 29, 1962.