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USA | |
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| Morrill (1958) Maine Mines & Minerals: Vol 1 - Western Maine.
Fisher, L.W. (1934) Graphite In Pegmatite. American Mineralogist, 19(4), 169-177. |
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| Douglas Watts |
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| Korsakov, Andrey V., Olga V. Rezvukhina, John A. Jaszczak, Dmitriy I. Rezvukhin, and Denis S. Mikhailenko. (2019) "Natural Graphite Cuboids" Minerals 9, no. 2: 110. https://doi.org/10.3390/min9020110
Thompson, Woodrow B., Bearss, Gene T., Falster, Alexander U., Simmons, William B., Nizamoff, Jams W. (2000) The Estes Quarry, Cumberland County, Maine: A New Pegmatite Mineral Locality. Rocks & Minerals, 75 (6) 408-418 doi:10.1080/00357520009605667 |
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| King, Vandall T. (2000) Mineralogy of Maine Vol. 2 - Mining History, Gems, and Geology. Maine Geological Survey. |
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| Smith, George Otis (1906). Graphite in Maine, Contributions to Economic Geology, 1905 (USGS Bulletin 285). |
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| American Mineralogist 61:431-434, 1976 |
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| Miller, B. L. (1912). Graphite deposits of Pennsylvania (Pennsylvania Topographic and Geologic Survey Commission), p. 47. |
- Blue Hill - Castine Mining District
| Anderson, 1991. Maine Mineral Localities, 2nd ed. |
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| King, Vandall T. (2000) Mineralogy of Maine Vol. 2 - Mining History, Gems, and Geology. Maine Geological Survey. |
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| Morrill & Hinckley, 1959. Maine Mines & Minerals, Vol. 2 |
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| Rainville, G. D. and Park, W. C. (1976) Nickeliferous Pyrrhotite Deposits, Knox County, Southeastern Maine in Lyons, P. C. and Brownlow, A. H. (editors) Studies in New England Geology, Memoir 146, Geological Society of America, p. 319-347. |
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| King, Vandall T. (2000) Mineralogy of Maine Vol. 2 - Mining History, Gems, and Geology. Maine Geological Survey. |
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| W. B. Thompson, D. L. Joyner, R. G. Woodman, and V. T. King (2005) A Collector's Guide to Maine Mineral Localities. Maine Geological Survey Bulletin 41 |
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| Thompson, Woodrow B., Joyner, Ronald L., Woodman, Raymond G., King, Vandall T. (1998) Bulletin (41), A Collector's Guide to Maine Mineral Localities (3rd ed.) Maine Geological Survey |
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| Thompson, Woodrow B., Joyner, Ronald L., Woodman, Raymond G., King, Vandall T. (1998) Bulletin (41), A Collector's Guide to Maine Mineral Localities (3rd ed.) Maine Geological Survey |
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| King, Vandall T., Foord, Eugene E. (1994) Mineralogy of Maine Vol. 1 - Descriptive mineralogy. Maine Geological Survey. |
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City quarry, Lewiston, Androscoggin County, Maine, USA