Pyrrhotite from selected localities.
Canada | |
| Hewitt, D. F. (1965) Graphite in Ontario. Industrial Minerals Report No. 20, Ontario Department of Mines |
Geological Survey of Canada Paper 70-50 |
Canada | |
| Hewitt, D. F. (1965) Graphite in Ontario. Industrial Minerals Report No. 20, Ontario Department of Mines |
Geological Survey of Canada Paper 70-50 |