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.