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USA | |
| Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 138 Galbraith, F.W. (1947), Minerals of AZ, AZ Bur. Mines Bull. 153: 12. |
| Galbraith, F.W. (1947), Minerals of AZ, AZ Bur. Mines Bull. 153: 12. |
| Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 138 Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 96. |