- Murphys Mining District (Esmeralda Mining District; Sperry Mining District)
| Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc. Clark, William B., Lydon, Philip A. (1963) Mines and Mineral Resources of Calaveras County, California. County Report 2. California Division of Mines and Geology Van Nostrand Reinholt Press: 127. |