Biotite from Hartford County, Connecticut, USA
USA | |
| Wilson, Wendell E. (2001) Notes From the Editors - Old Yuma mine. The Mineralogical Record, 32 (6) 426-501 |
| www.geol.vt.edu/gradstu/pwelch/research.html |
USA | |
| Wilson, Wendell E. (2001) Notes From the Editors - Old Yuma mine. The Mineralogical Record, 32 (6) 426-501 |
| www.geol.vt.edu/gradstu/pwelch/research.html |