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Hearing Before the Subcommittee on Research and Science Education, Committee on Science and Technology, House of Representatives, One Hundred Eleventh Congress, First Session, October 22, 2009
出版U.S. Government Printing Office, 2010
ISBN01608555869780160855580
URLhttp://books.google.com.hk/books?id=NHZVuPG7iykC&hl=&source=gbs_api
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