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Maine Geological Survey, Open-File Map 10-69.
Maine Geological Survey
Bedrock Groundwater Resources Basic Data Maps
Tolman, Susan S. (compiler), 2010, Bedrock well yields in the Presque Isle 30x60-minute quadrangle, Maine: Maine Geological Survey, Open-File Map 10-69, map, scale 1:125,000. Maine Geological Survey Maps. 1872. http://digitalmaine.com/mgs_maps/1872
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