Base source: USGS 1:100,000 county base compiled in 1973; interpretations derived from soil map constructed 1972.; "Projection and 10,000-metre grid ticks, zone 16: Universal Transverse Mercator. 25,000-foot grid ticks based on Indiana coordinate system, west zone."; Dec. 1978.; Includes location map. 79 x 86 centimeters 1:50,000