Hearings on National Defense Authorization Act for fiscal year 1990--H.R. 2461 and oversight of previously authorized programs before the Committee on Armed Services, House of Representatives, One Hundred First Congress, first session Procurement and Military Nuclear Systems Subcommittee hearings on procurement of aircraft, missiles, weapons and tracked combat vehicles, ammunition, and other procurement : hearings held March 8, 16, 23, May 11, 18, and 23, 1989.