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Maine Geological Survey, Open-File Map 01-256
Maine Geological Survey
Daniel B. Locke, Craig B. Neil, William J. Nichols Jr, and Thomas K. Weddle, Hydrogeology and water quality of significant sand and gravel aquifers in parts of Aroostook, Penobscot, and Washington Counties, Maine
Significant Sand and Gravel Aquifer Maps (scale 1:24,000)
Neil, Craig D. and Locke, Daniel B. (compilers), Locke, Daniel B. (mapper), 2001, Significant sand and gravel aquifers in the Twin Brook quadrangle, Maine: Maine Geological Survey, Open-File Map 01-256, map, scale 1:24,000. Maine Geological Survey Maps. 1646. http://digitalmaine.com/mgs_maps/1646
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