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Hearing Before the Subcommittee on the Upper Atmosphere of the Committee on Aeronautical and Space Sciences, United States Senate, Ninety-fourth Congress, Second Session, December 15, 1976
出版U.S. Government Printing Office, 1977
URLhttp://books.google.com.hk/books?id=eQ5O8Pu448AC&hl=&source=gbs_api
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