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Citation Info Geological Survey (U.S.), cartographer.. Corydon quadrangle, Indiana--Kentucky :15 minute series (topographic) /mapped by the Geological Survey and the Army Map Service ; published for civil use by the Geological Survey.. [JPEG]. United States, Department of the Interior, Geological Survey. Retrieved from https://gmutantt.gmu.edu/catalog/bda00722-bc03-43af-8e1c-8dee3c1a107a