Ocean dumping : hearings before the Subcommittee on Oceanography and the Subcommittee on Fisheries and Wildlife Conservation and the Environment of the Committee on Merchant Marine and Fisheries, House of Representatives, Ninety-sixth Congress, on ocean dumping authorization (fiscal year 1980) and oversight--H.R. 1963, H.R. 2519, March 5, 1979, ocean dumping deadline oversight, June 27, 1979, ocean dumping authorization (fiscal year 1981) and oversight--H.R. 5214, February 20, 1980.