1970. Switzer, J. E. (Jesse Elmer) and Kingsbury, Robert C. Relief shown by landform drawing. Shows southern limit of glaciation in Indiana. Originally compiled approximately 1932 by J.E. Switzer, Department... Department of Geography, Indiana University.
1970. Kingsbury, Robert C. and Hollingsworth, John M. Detached from: Kingsbury, Robert C. Atlas of Indiana, page 14. Also shows Wisconsin glacial boundary and Illinoian glacial boundary. Scale approxim... Department of Geography, Indiana University.