Defense procurement policies and procedures cost management and control : hearings before the Special Panel on Defense Procurement Procedures of the Committee on Armed Services, House of Representatives, Ninety-seventh Congress, first session, July 23, 28, 30, September 10, 18, 19, 21, 24, 25, 26, 27, October 7, 15, 20, 22, 27, and 28, 1981