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Nonprofit Sample and Core Repositories Open to the Public in the United States

J. W. SchmokerThomas C. MichalskiPatricia B. Worl

出版	U.S. Department of the Interior, Geological Survey, 1984
URL	http://books.google.com.hk/books?id=ON_pFwejilMC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN