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1by Bastin, Edson S. (Edson Sunderland), 1878-1953Subjects: “...Zinc mines and mining Mississippi River Valley....”
Published 1939
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2by Bain, Harry Foster, 1872-1948Subjects: “...Zinc mines and mining Mississippi River Valley....”
Published 1907
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3by Heyl, Allen V. (Allen Van), 1918-2008Subjects: “...Zinc mines and mining Mississippi River Valley....”
Published 1959
Government Document Book