Ocean pollution : hearings before the Subcommittee on Oceans and Atmosphere of the Committee on Commerce, United States Senate, Ninety-third Congress, first session on S. 1067, to amend the Oil Pollution Act, 1961 (75 Stat. 402), as amended, to implement the 1969 and the 1971 amendments to the International Convention for the Prevention of the Pollution of the Sea by Oil, 1954, as amended, and for other purposes : S. 1070, to implement the International Convention relating to Intervention on the High Seas in Cases of Oil Pollution Casualties, 1969 : S. 1351, to amend the Marine Protection, Research, and Sanctuaries Act of 1972, and for other purposes, June 12, 13, and 28, 1973.