Graphite from selected localities.
USA | |
| The Minerals of New York City & Its Environs, New York Mineralogical Club Bull. Vol. 3, No. 1, Manchester, J.G. (1931): 94. |
| The Minerals of New York City & Its Environs, New York Mineralogical Club Bull. Vol. 3, No. 1, Manchester, J.G. (1931): 85. |
The Minerals of New York City & Its Environs, New York Mineralogical Club Bull. Vol. 3, No. 1, Manchester, J.G. (1931): 86. | |
Rocks & Min.:7:148 & 8:40. |
Croft Mine, Peekskill, Westchester County, New York, USA