Base source: USGS 1:100,000 county base compiled in 1976; 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."; Feb. 1978.; Includes location map. 112 x 92 centimeters Scale 1:50,000