Predatory animals : hearings before the Subcommittee on Fisheries and Wildlife Conservation and the Environment of the Committee on Merchant Marine and Fisheries, House of Representatives, Ninety-third Congress, first session on H.R. 38, H.R. 3309, H.R. 3393, H.R. 3612, H.R. 3635, H.R. 4617, H.R. 5321, H.R. 5496, bills to authorize the Secretary of the Interior to assist the states in controlling damage caused by predatory animals; to establish a program of research concerning the control and conservation of predatory animals; to restrict the use of toxic chemicals as a method of predator control; and for other purposes : H.R. 4759, a bill to authorize the Secretary of the Interior to assist the states in controlling damage caused by predatory and depredating animals; to establish a program of research concerning the control and conservation of predatory and depredating animals; to restrict the use of toxic chemicals as a method of predator control; and for other purposes, March 19, 20, 1973.