| 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. |
Bull Moose Mine, Custer, Custer Mining District, Custer County, South Dakota, USA