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USA | |
| Boucot, Arthur J., Field, Michael T., Fletcher, Raymond, Forbes, William H., Naylor, Richard S., and Pavlides, Louis (1964) Reconnaissance Bedrock Geology of the Presque Isle Quadrangle, Maine, Quadrangle Mapping Series 2, Department of Economic Development, Augusta, Maine, pp 123 + plate. |
| Pavlides, Louis and Milton, Charles, 1962, Geology and Manganese Deposits of the Maple and Hovey Mountains Area, Aroostook County, Maine, U. S. Geological Survey Professional Paper 362, pp. 116 + plates. |
| King, Vandall T., Foord, Eugene E. (1994) Mineralogy of Maine Vol. 1 - Descriptive mineralogy. Maine Geological Survey. |
| pubs.usgs.gov (n.d.) http://pubs.usgs.gov/of/2005/1189/downloads/asbestos_sites.xls. |
| King, Vandall T., Foord, Eugene E. (1994) Mineralogy of Maine Vol. 1 - Descriptive mineralogy. Maine Geological Survey. |