Organization of Public Health Service : hearings before a subcommittee of the Committee on Interstate and Foreign Commerce, House of Representatives, Eighty-eighth Congress, first session on H.R. 2410, a bill to amend the Public Health Service Act to provide greater flexibility in the organization of the service, and for other purposes, April 23, 24, 25, 26; May 14, 15; June 10, 11, 1963