Humane Slaughter: Hearings Before the Subcommittee on Livestock and Feed Grains of the Committee on Agriculture, House of Representatives, Eighty-fifth Congress, First Session on H.R. 176, H.R. 2880, H.R. 3029, H.R. 3049, H.R. 5671, H.R. 5820, H.R. 6422, and H.R. 6509, April 2 and 12, 1957