- North Columbia Mining District (Columbia Hill Mining District)
- Delhi - St. Gothard Consolidated Mine (Delhi - St. Gothard Mine)
| Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 203. Blake, Wm. P. (1855), Observations on the extent of the gold region of California and Oregon, with notices of mineral localities in California and of some remarkable specimens of crystalline gold: American Journal of Science, 2nd. Series: 20: 76 |