National Gypsum Company, general drilling scenes in quarry

Date scanned: 2002-6-18. NG-10; General drilling scenes in quarry. (Note holes plugged for loading and blasting at end of shift; also block-holing boulders with hand-held sinker-type rock drill.) National Gypsum Company, National City, Michigan - F. G. Anderson - December 7, 1947. Held in the Russel...

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Dades bibliogràfiques

Format:	Thesis
Publicat:	Colorado School of Mines. Arthur Lakes Library 1947
Matèries:	National Gypsum Company Gypsum industry and trade Miners Open pit mining Scenes, snow
Accés en línia:	http://hdl.handle.net/11124/7438
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