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Maine Geological Survey, Geologic Facts and Localities, Circular GFL-43.
Maine Geological Survey
Weddle, Thomas K., 2000, A General Introduction to the Presumpscot Formation Maine's "Blue Clay": Maine Geological Survey, Geologic Facts and Localities, Circular GFL-43, 17 p. Maine Geological Survey Publications. 335. http://digitalmaine.com/mgs_publications/335
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