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Maine Geological Survey, Open-File Map 87-6.
Maine Geological Survey
Androscoggin County; Cumberland County; Oxford County; Sagadahoc County; York County
Surficial Geology Maps (scale 1:250,000)
Thompson, Woodrow B. (compiler), 1987, Surficial geology of the Portland 1 x 2 degree quadrangle, Maine: Maine Geological Survey, Open-File Map 87-6, map, scale 1:250,000. Maine Geological Survey Maps. 737. http://digitalmaine.com/mgs_maps/737
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