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USA | |
- Bootstrap Mining District
| Barrick Gold Corporation |
- Maggie Creek Mining Subdistrict
| Newmont Mining Corporation |
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| Mineralogical Record 26:467 |
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| Castor, Stephen B., Ferdock, Gregory C. (2004) Minerals of Nevada. Special Publication 31. Nevada Bureau of Mines and Geology |
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| Campbell, T.J., Roberts, W.L. (1985) Mineral Localities in the Black Hills of South Dakota. Rocks & Minerals: 60: 109-118 (117).
Dunn, Peter J., Rouse, R. C., Nelen, J. A. (1984) Englishite: new chemical data and a second occurrence, from the Tip Top pegmatite, Custer, South Dakota. The Canadian Mineralogist, 22 (3) 469-470 |
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| Bullock, Kenneth C. (1981) Minerals and mineral localities of Utah. Bulletin 117. Utah Geological and Mineral Survey
Palache, Charles, Berman, Harry, Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Ect. John Wiley and Sons, New York. |
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| Wilson, W. (2010): The Clay Canyon Variscite Mine, Fairfield Utah. Mineralogical Record. 41:321-349.
Thorne, Brent (n.d.) Personal communcation. |
Tip Top Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA