Graphite from selected localities.
USA | |
| Thompson, W.B., et.al., 1998, Maine Mineral Localities, 3rd edition, Maine Geological Survey, Augusta. |
"Maine Mineral Localites, 3rd Ed." by Thompson, W.B., et.al. , 1998 | |
| King, V. and Foord, E., 1994, Mineralogy of Maine, v. 1. |