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Mineral-resource Appraisal of the Rolla 10 X 20 Quadrangle, Missouri, as of September 1980

其他書名	A Nontechnical Summary
出版	U.S. Geological Survey, 1983
URL	http://books.google.com.hk/books?id=caXGNnjPpRsC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN