Atlantic tuna : hearings before the Subcommittee on Fisheries and Wildlife Conservation and the Environment and the Committee on Merchant Marine and Fisheries, House of Representatives, Ninety-sixth Congress, second session, on Atlantic Tuna Convention authorization and oversight, H.R. 6310, a bill to authorize appropriations for the Atlantic Tuna Convention Act for fiscal years 1981, 1982, and 1983, March 6, 1980, [and] Atlantic bluefin tuna conservation oversight, May 1, 1980.