National cancer attack act of 1971 : hearings before the Subcommittee on Public Health and Environment of the Committee on Interstate and Foreign Commerce, House of representatives, Ninety-second Congress, first session, on H.R. 8343, H.R. 10681, S. 1828 ( and all other bills and resolutions), amending the Public Health Service Act to provide for the conquest of cancer, September 15, 16, 20, 21, 27, 28, 29, 30; October 4, 7, and 11, 1971.