1. Illinois-Indiana, Mount Carmel quadrangle : topography. Maps University Of Illinois Urbana Champaign Public content 1904. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1902.";Includes "diagram of township.";Relief shown by contours and spot heights.;1 map, colored;45 x 35 cm.... U.S. Geological Survey (U.S.).