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Books by W. R. Hardwick

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3 books found
Open-pit copper mining methods and practices at the Chino Mines Division, Kennecott Copper Corp., Grant County, N. Mex.
Open-pit copper mining methods and practices at the Chino M…
By: W. R. Hardwick
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Open-pit copper mining methods and practices, Copper Cities Division, Miami Copper Co., Gila County, Ariz.
Open-pit copper mining methods and practices, Copper Cities…
By: W. R. Hardwick
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Block-caving mining methods and costs Bagdad Mine, Bagdad Copper Corp. Yavapai County, Ariz
Block-caving mining methods and costs Bagdad Mine, Bagdad C…
By: W. R. Hardwick
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