Biotite from selected localities.
USA | |
| Morgan, V. and Erd, R.C. (1969) Minerals of the Kramer borate district, California California Division of Mines and Geology Mineral Information Service: 22(9&10): 147; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 428. |
| Am Min 49:543-555 |