Sphalerite from Cargo Muchacho Mining District (Hedges Mining District; Ogilby Mining District), Cargo Muchacho Mountains, Imperial County, California, USA
USA | |
| Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc. Morton, Paul K. (1977) Geology and Mineral Resources of Imperial County California. County Report 7. California Division of Mines and Geology Van Nostrand Reinholt Press: 82. |
| Walstrom, Robert E. (n.d.) Personal communication. |