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Report of Proceedings of the American Mining Congress: Nineteenth Annual Session, Chicago, Illinois, November 13-16, 1916 Report of Proceedings of the American Mining Congress: Nineteenth Annual Session, Chicago, Illinois, November 13-16, 1916

Report of Proceedings of the American Mining Congress, Tenth Annual Session, Joplin, Mo., November 11-16, 1907 Report of Proceedings of the American Mining Congress, Tenth Annual Session, Joplin, Mo., November 11-16, 1907

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Report of proceedings of the American Mining Congress, eighteenth annual session, San Francisco, California, September 20-22, 1915 Report of proceedings of the American Mining Congress, eighteenth annual session, San Francisco, California, September 20-22, 1915

Report of proceedings of the American Mining Congress, seventeenth annual session, Phoenix, Arizona, December 7-11, 1914 Report of proceedings of the American Mining Congress, seventeenth annual session, Phoenix, Arizona, December 7-11, 1914

Proceedings of the second annual National mine tax conference at the twenty-fourth annual convention of the American mining congress, Chicago, Illinois, October 17 to 22, 1921 Proceedings of the second annual National mine tax conference at the twenty-fourth annual convention of the American mining congress, Chicago, Illinois, October 17 to 22, 1921

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Placer Mining in the Rockies, ca. 1902. An Exceptional Print of a Vintage Photochrom Image from the Library of Congress Collection Placer Mining in the Rockies, ca. 1902. An Exceptional Print of a Vintage Photochrom Image from the Library of Congress Collection

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Report of proceedings of the American Mining Congress, fifteenth annual session, Spokane, Wash., Nov. 25-29, 1912 Report of proceedings of the American Mining Congress, fifteenth annual session, Spokane, Wash., Nov. 25-29, 1912

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Report of proceedings of the American Mining Congress: fifteenth annual session, Spokane, Wash., Nov. 25-29, 1912 Report of proceedings of the American Mining Congress: fifteenth annual session, Spokane, Wash., Nov. 25-29, 1912

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