Description: This map from the U. S. Geological Survey Open-File Report 81-1060, Estimated Water Use in the Southwest Florida Water Management District and Adjacent Areas, 1980, shows the location of public-supply systems, water management district and hydrologic units for Polk County. Source: A. D. Duerr and J. T. Trommer, USGS Open-File Report 81-1060 (Tallahassee, FL: U. S. Geological Survey, 1981) 17 Map Credit: Courtesy the University of South Florida Library |
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