Biotite from selected localities.
USA | |
| Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). |
USGS Prof Paper 255 | |
| Grey (2005) |
C. Lemanski collection (7805CL).; Cameron et al (1954) |