Search U.S. government technical reports digitized or harvested by TRAIL.
Mining methods and costs at the Ground Hog Unit, Asarco Mining Co., Vanadium, New Mexico
Mining practice at the Chino mines, Nevada Consolidated Copper Co., Santa Rita, N. Mex.
Two-way radio communication at Santa Rita Open Pit, Kennecott Copper Corp., Santa Rita, N. Mex.