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USA | |
| Campbell, T.J., Roberts, W.L. (1985) Mineral Localities in the Black Hills of South Dakota. Rocks & Minerals: 60(3): 109-118 (117). Peacor, D.R. (1969) Triphylite-sarcopside-graftonite inter-growths from Custer, South Dakota. American Mineralogist: 54(5-6): 969–972. |
| Loomis, T. (2011), News from the Black Hills, South Dakota. Mineral News in press |
| Rocks & Minerals: 60: 117. M.Wirth collection, received from John Dagenais, Vancouver University |
| Julius Weber collection |
| 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 |
| Rocks & Minerals: 67(6): 380-388. |
- Unorganized mining district [5]
| King, Van (n.d.) Personal communcation. |
Bull Moose Mine, Custer, Custer Mining District, Custer County, South Dakota, USA