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USA | |
| Creasy, S.C. & G.L. Quick (1955), Copper deposits of part of Helvetia mining district, Pima Co., AZ, USGS Bull. 1027-F: 312. |
| Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 402. |
| MRDS database Dep. ID file #10039414, MRDS ID #M050049. |
| Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 402 Creasey, S.C. & G.L. Quick (1955), Copper deposits of part of Helvetia mining district, Pima Co., AZ, USGS Bull. 1027-F: 301-323. Schrader & Hill (1915): 108-110 |
| Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 402. |
| Luetcke, Rolf (n.d.) Personal communication. |
Omega Mine, Monument Mountain, Helvetia, Helvetia-Rosemont Mining District, Pima County, Arizona, USA