Kниги автора Walter R. b. 1870 Crane

Gold and silver; comprising an economic history of mining in the United States, the geographical and geological occurrence of the precious metals, . of methods of mining and extraction of values

Index of mining engineering literature, comprising an index of mining, metallurgical, civil, mechanical, electrical and chemical engineering subjects as related to mining engineering

Ore mining methods, comprising descriptions of methods of support in extraction of ore, detailed descriptions of methods of development of mines, of . deposits including stull and square-set

Ore mining methods, comprising descriptions of methods of support in extraction of ore, detailed descriptions of methods of stoping and mining in . stull and square-set mining, filling and cavi