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USA | |
| Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 162 Butler, B.S., et al (1938b), Geology and ore deposits of the Tombstone district, AZ, AZ Bur. Mines Bull. 143. |
| Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 162. |
| MRDS database Dep. ID file #10039571, MRDS ID #M050352. |
| MRDS database Dep. ID file #10039570, MRDS ID #M050351. |
Empire Mine, Tombstone Mining District, Cochise County, Arizona, USA