Mining July

Strike In The Copper Mining District Of Michigan. Letter From The Secretary Of Labor, Transmitting In Response To A Senate Resolution Of January 29, 1914, A Report In Regard To The Strike Of Mine Workers In The Michigan Copper District Which Began On July

Petroleum And Natural Gas In New York State: A Paper Read Before The American Institute Of Mining Engineers, Duluth Meeting, July, 1887: Revised To Ju

Mining The Sky: Proceedings Of The Mpa/Eso/Mpe Workshop Held At Garching, Germany, July 31 - August 4, 2000

Promontorio Silver-Mine, Durango, Mexico: A Paper Read Before The American Institute Of Mining Engineers, At The Toronto Meeting, July, 1907.