1949. Blueline.; State roads revised to January 1, 1949.; 1937.; Data obtained from State-wide Highway Planning Survey.; Includes location map, chart of ... State Highway Commission of Indiana.
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1980. United States. Soil Conservation Service. Base source: USGS 1:100,000 county base map compiled in 1977; interpretations derived from soil survey published in 1968.; "June 1980. 5,R-37,840."... U.S. Dept. of Agriculture, Soil Conservation Service (Washington.).