Biotite from selected localities.
USA | |
| Januzzi, 1976. Mineral Localities of CT and Southeastern NY State, p223-224 |
The Minerals of New York City & Its Environs, New York Mineralogical Club Bull. Vol. 3, No. 1, Manchester, J.G. (1931): 94. Breidenbaugh, 1873; Nightingale 2001 | |
| Januzzi, 1976. Mineral Localities of CT and Southeastern NY State |
Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA