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USA | |
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| Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 384
Dunn, Pete J., Simmons, William B., Peacor, Donald R. (1984) Paulkerrite, a new titanium phosphate from Arizona. The Mineralogical Record, 15 (5) 303-306 |
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| Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 340
Jahns, Richard H. (1952), Pegmatite Deposits of the White Picacho District, Maricopa and Yavapai Counties, Arizona, Arizona Bureau of Mines Bull. 162 |
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| Jahns, R.H. (1952), Pegmatite deposits of the White Picacho district, Maricopa and Yavapai Cos., AZ, AZ Bur. Mines Bull. 162: 98-103 |
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| Jahns, R.H. (1952), AZ Bur. Mines Bull. 162: 87-90 |
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| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
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| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
- Cripple Creek Mining District
| Carnein, Carl R., Bartos, Paul J. (2005) Famous mineral localities: The Cripple Creek Mining District, Colorado, in March - April 2005. The Mineralogical Record, 36 (2) 143-185 |
7U7 Ranch, Bagdad Mine area, Hillside, Eureka Mining District, Yavapai County, Arizona, USA