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• Mining methods and costs at the Ground Hog Unit, Asarco Mining Co., Vanadium, New Mexico
• Mining and engineering methods and costs of the Hanover Bessemer Iron & Copper Co., Fierro, N. 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.