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USA | |
- Tombstone Mining District
| Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 179, 394, 414 Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 97, 99, 111. Schaller, W.T. (1939), Corrections and additions, Am.Min.: 24: 346-347 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.: 304 Butler, B.S., et al (1938b), Geology and ore deposits of the Tombstone district, AZ, AZ Bur. Mines Bull. 143. |
| Wilson, W.E. (1988), The Iron Cap Mine, Min.Rec.: 19(2): 81-87. |