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USA | |
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| Anthony, John Williams, Bideaux, Richard A., Bladh, Kenneth W., Nichols, Monte C. (2000) Handbook of Mineralogy Vol. 4 - Arsenates, phosphates, vanadates. Mineral Data Publishing, Tucson, Arizona.
Leavens, P. B. & Simpson, Thomas A. (1975): Iron-manganes phospates of the Williams pegmatites, Coosa County, Alabama. Mineralogical Record 6 (2): 67-73 |
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| Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872
Moore, Paul B. (1973) Pegmatite Phosphates: Descriptive Mineralogy and Crystal Chemistry. The Mineralogical Record, 4 (3) 103-130 |
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| Thompson, W. B., Falster, A. U., & Mortimer, T. J. (2022). The Keyes Mica Mines, Orange, Grafton County, New Hampshire. Rocks & Minerals, 97(4), 302-329. |
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| Peacor, D.R. (1969) Triphylite-sarcopside-graftonite inter-growths from Custer, South Dakota. American Mineralogist: 54(5-6): 969–972. |
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| Roberts, Willard L., Campbell, Thomas J. (1986) Phosphate Minerals from the Tip Top Mine, Black Hills, South Dakota. The Mineralogical Record, 17 (4) 237-254
Rocks & Minerals: 60: 117. |
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| Peacor, Donald R., Dunn, Pete J., Roberts, Willard L., Campbell, Thomas J., Simmons, William B. (1984) Sinkankasite, a new phosphate from the Barker pegmatite, South Dakota. American Mineralogist, 69 (3-4) 380-382 |
Bull Moose Mine, Custer, Custer Mining District, Custer County, South Dakota, USA