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USA | |
| Spry, P. G., McFadden, S., Teale, G. S., Alers, B., Shallow, J. M., & Glenn, J. M. (2021). Nodular sillimanite rocks as field indicators to metamorphosed massive sulfide deposits. Ore Geology Reviews, 104632. Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. Am Min 50:1179-1212 |
| Hanley, J.B., Heinrich, E.W., Page, L.R. (1950) Pegmatite investigations in Colorado, Wyoming, and Utah, 1942-1944. Professional Paper 227. US Geological Survey doi:10.3133/pp227 |
- Grape Creek Mining District (Greenhorn Mining District)
| Spry, P. G., McFadden, S., Teale, G. S., Alers, B., Shallow, J. M., & Glenn, J. M. (2021). Nodular sillimanite rocks as field indicators to metamorphosed massive sulfide deposits. Ore Geology Reviews, 104632. |
- Guffey Mining District (Freshwater Mining District)
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| 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. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |