NASA Authorization for Fiscal Year 1969: Hearings Before the Committee on Aeronautical and Space Sciences, United States Senate, Ninetieth Congress, Second Session on S. 2918, a Bill to Authorize Appropriations to the National Aeronautics and Space Administration for Research and Development, Construction of Facilities, and Administrative Operations ; and for Other Purposes, April 24, 25, and 30, 1968, Part 1
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