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Hearings Before the Subcommittee on Space Science and Applications and Subcommittee on Energy of the Committee on Science and Astronautics, U.S. House of Representatives, Ninety-third Congress, First Session
出版U.S. Government Printing Office, 1973
URLhttp://books.google.com.hk/books?id=dHjSAAAAMAAJ&hl=&source=gbs_api
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