- Denver group (Denver Mining and Milling Company; Ore Hill group; Red Ledge Mine; Fenner Mine; Chance Mine; Pacoima Canyon Mine)
| Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc. Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 132, 342 Sharp, W.E. (1959) Minerals from Los Angeles County, California. Printed privately, Los Angeles, California: 30-31 Tucker, W. Burling (1921), Los Angeles field division: California Mining Bureau. Report 17: 318 Van Nostrand Reinholt Press: 69. |