tag:digital.library.illinois.edu,2005:/itemsItems2022-09-15T18:31:26Ztag:digital.library.illinois.edu,2005:Item/668832016-11-15T17:24:39Z2022-09-15T18:31:26ZMissouri-Illinois, Hannibal quadrangleRelief shown by contours and spot heights.University of Illinois at Urbana-Champaign Library