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Maine Geological Survey, Open-File Map 06-42.
Maine Geological Survey
Significant Sand and Gravel Aquifer Maps (scale 1:24,000)
Johnston, Robert A., 2006, Significant sand and gravel aquifers in the Seven Islands quadrangle, Maine: Maine Geological Survey, Open-File Map 06-42, map, scale 1:24,000. Maine Geological Survey Maps. 1728. http://digitalmaine.com/mgs_maps/1728
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