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Mineral Resources of the United States, 1918, [by] G.F. Loughlin, Geologist in Charge, Division of Mineral Resources. Part II. -- Nonmetals, [by] R.W. Stone, Geologist in Charge

United States. Congress. House

出版	1920
URL	http://books.google.com.hk/books?id=75EDwgEACAAJ&hl=&source=gbs_api