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Maine Geological Survey, Open-File Report 80-14c. Analysis of 1100 samples for cold-extractable heavy metals and copper. Maps show locations of sample sites and concentrations of metals.
Maine Geological Survey
Mineral Resources and Mining Reports
North American Exploration Inc., 1980, Evaluation of the mineral potential, upper St. John River valley, Aroostook County, Maine: Appendix B: Geochemistry: Maine Geological Survey, Open-File Report 80-14c, 26 p. report, 4 tables, 2 maps, 1 plate. Maine Geological Survey Publications. 157. http://digitalmaine.com/mgs_publications/157
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