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Maine Geological Survey, Open-File Map 78-11 (superseded by Hussey, 1987, Maine Geological Survey Open-File 85-87)
Maine Geological Survey
Hussey, Arthur M., II, 1978, Preliminary bedrock and brittle fracture map of the Portland 2-degree quadrangle: Maine Geological Survey, Open-File Map 78-11 (superseded by Hussey, 1987, Maine Geological Survey Open-File 85-87), 1 plate, scale 1:250,000. Maine Geological Survey Maps. 14. http://digitalmaine.com/mgs_maps/14
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