Marine mammals : hearings before the Subcommittee of Fisheries and Wildlife Conservation and the Environment of the Committee on Merchant Marine and Fisheries, House of Representatives, Ninety fifth Congress, first session, on marine mammal oversight, February 17, 1977, tuna porpoise regulations, March 2, 1977, marine mammal authorization, H.R. 4740, March 15, 1977.

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