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A Directory of Information Resources in the United States: Physical Sciences, Biological Sciences, Engineering

National Referral Center for Science and Technology (U.S.)

出版	U.S. Government Printing Office, 1965
URL	http://books.google.com.hk/books?id=_eSbPVQGS4oC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN