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Hearings Before the Subcommittee on Aerospace Technology and National Needs of the Committee on Aeronautical and Space Sciences, United States Senate, Ninety-fourth Congress, Second Session, September 27 and 28, 1976
出版U.S. Government Printing Office, 1976
URLhttp://books.google.com.hk/books?id=tqptE-wgy2EC&hl=&source=gbs_api
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