Biotite from selected localities.
USA | |
| Morton, P.K. (1977) Mines and mineral resources of Imperial County, California. California Division of Mines and Geology County Report 7, 104 pp.: 56. |
| U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Cal Div Mines & Geol County Report 7 "Geology and Mineral resources of Imperial Co., CA" |