Physical Format: Certificates / Subject Headings: Iron Mines and Mining - Minnesota Digital Library Search Results

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Joseph A. Holmes Safety Award Certificate to Leonard Burt Open Pit Mine, Oliver Iron Mining Company, Chisholm, Minnesota

Joseph A. Holmes Safety Award Certificate to Sherman Open Pit MIne, Oliver Iron Mining Division, Chisholm, Minnesota

Joseph A. Holmes Safety Award Certificate to Snyder Mining Company, Duluth, Minnesota

United States Department of Interior, Bureau of Mines, Certificate of Award in Safety to Sherman Mine, United States Steel Corporation, Chisholm, Minnesota

United States Department of Interior, Bureau of Mines, Certificate of Mine Rescue Training to Charles H. Isaacson, Virginia, Minnesota