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USA | |
| Raabe, K. C. & Sack, R. O. (1984): Growth zoning in tetrahedrite-tennantite from the Hock Hocking mine, Alma, Colorado. Canadian Mineralogist 22, 577-582. Metal Mining Mining Geol.(1937):A.I.M.E.:432. |
| Butler, Bert Sylvenus (1941) Ore deposits in the vicinity of the London fault of Colorado. USGS Bulletin: 911 Singewald, Quentin Dreyer |
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
| Collector's Edge Minerals Inc |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Jensen, M. (2004) A mystery mineral occurrence at the Sweet Home mine, Park County, Colorado. Mineral News, 20 (5) Excalibur Mineral Corp. 1-2 |
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
Sweet Home Mine, Mount Bross, Alma Mining District, Park County, Colorado, USA