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Mineral Resources of the United States, 1917, [by] H.D. McCaskey, Geologist in Charge. Part II. -- Nonmetals, [by] G.F. Loughlin, Geologist in Charge

United States. Congress. House

出版	1919
URL	http://books.google.com.hk/books?id=anECwgEACAAJ&hl=&source=gbs_api