Block-caving mining methods and costs Bagdad Mine, Bagdad Copper Corp. Yavapai County, Ariz

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100 1 ‡aHardwick, W. R. ‡q(William R.) ‡0http://id.loc.gov/authorities/names/no2024096127 ‡1http://id.loc.gov/rwo/agents/no2024096127
245 1 0 ‡aBlock-caving mining methods and costs Bagdad Mine, Bagdad Copper Corp. Yavapai County, Ariz. / ‡cby W.R. Hardwick.
260 ‡a[Washington, D.C.] : ‡bU.S. Dept. of the Interior, Bureau of Mines, ‡c1959.
300 ‡aii, 28 p. : ‡bill., maps ; ‡c27 cm.
336 ‡atext ‡btxt ‡2rdacontent
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490 0 ‡aInformation circular / U. S. Dept. of the Interior, Bureau of MInes ; ‡v7890
538 ‡aMode of access: Internet.
650 0 ‡aBlock theory (Rock mechanics) ‡0http://id.loc.gov/authorities/subjects/sh85014916
650 0 ‡aCopper mines and mining ‡zArizona ‡zYavapai County.
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