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USA | |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Palache, C., Berman, H. & Frondel, C. (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, 7th. edition, Volume I: 108. |
| Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc. Logan, Clarence August (1918), Platinum and allied metals in California: California Mining Bureau. Bulletin 85, 120 pp.: 46-47 Van Nostrand Reinholt Press: 41. |
| Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc. Averill, C.V. (1938), Gold dredging in Shasta, Siskiyou and Trinity counties: California Journal of Mines and Geology, California Division Mines (Report 34): 34(2): 119-120 Van Nostrand Reinholt Press: 43. |
- Harrison Gulch Mining District
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. Averill, C.V. (1946), Placer mining for gold in California: California State Division of Mines and Geology Bulletin 135, 336 p.: Pl. 4. |
| Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc. Van Nostrand Reinholt Press: 44. |