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USA | |
| Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc. Averill, Charles V. (1943), Current notes on activity in the strategic minerals, Sacramento field district: California Journal of Mines and Geology, California Division of Mines (Report 39): 39: 74 Van Nostrand Reinholt Press: 204. |
- Grass Valley Mining District
| Murdoch, Joseph, Webb, Robert W. (1966) Minerals of California, Centennial Volume (1866-1966) - California Division Mines and Geology, Bulletin 189. p.1-559. Lindgren, Waldemar (1896a), The gold-quartz veins of Nevada City and Grass Valley districts, California: USGS 17th. Annual Report, part 2: 115 |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
- Nevada City Mining District
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |