|
USA | |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
- Angels Camp Mining District
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
- Mountain Ranch Mining District
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
- Murphys Mining District (Esmeralda Mining District; Sperry Mining District)
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
- San Andreas Mining District
| Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 297. Bradley, W.W., et al (1918), Manganese and chromium in California: California Mining Bureau. Bulletin 76: 31 |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |