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Hearing Before the Subcommittee on Energy and Environment of the Committee on Science, House of Representatives, One Hundred Sixth Congress, First Session, July 21, 1999
出版U.S. Government Printing Office, 1999
ISBN01605945619780160594564
URLhttp://books.google.com.hk/books?id=TdVGAQAAMAAJ&hl=&source=gbs_api
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