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Mineral Resources of the United States, 1919, [by] G.F. Loughlin, Geologist in Charge, Division of Mineral Resources. Part I. -- Metals, [by] G.F. Loughlin, Geologist in Charge
出版1921
URLhttp://books.google.com.hk/books?id=a2m2wgEACAAJ&hl=&source=gbs_api