Steel container marking (to indicate country of origin of steel) : hearings before the Subcommittee on Commerce of Finance of the Committee on Interstate and Foreign Commerce, House of Representatives, Eighty-ninth Congress, first session on H.R. 6182, H.R. 6647, H.R. 6775, bills to prohibit the introduction into interstate commerce of any shipping container manufactured in the United States from imported steel unless the container is marked so as to indicate the country of origin of the steel, April 28, 1965.