Biotite from selected localities.
Austria | |
| A. Strasser: Die Minerale Salzburgs (1989) |
| S.Schwabl (2016) |
| A. Strasser: Die Minerale Salzburgs, 1989 |
Austria | |
| A. Strasser: Die Minerale Salzburgs (1989) |
| S.Schwabl (2016) |
| A. Strasser: Die Minerale Salzburgs, 1989 |