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Maine Geological Survey, Open-File Map 10-65.
Maine Geological Survey
Androscoggin County; Cumberland County; Oxford County; Sagadahoc County; York County
Bedrock Groundwater Resources Basic Data Maps
Tolman, Susan S. (compiler), 2010, Overburden thickness in the Portland 30x60-minute quadrangle, Maine: Maine Geological Survey, Open-File Map 10-65, map, scale 1:125,000. Maine Geological Survey Maps. 1877. http://digitalmaine.com/mgs_maps/1877
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