tag:digital.library.illinois.edu,2005:/itemsItems2022-09-15T18:31:28Ztag:digital.library.illinois.edu,2005:Item/669192016-11-15T17:24:55Z2022-09-15T18:31:28ZIllinois, Herscher quadrangleRelief shown by contours and spot heights.University of Illinois at Urbana-Champaign Librarytag:digital.library.illinois.edu,2005:Item/668732016-11-15T17:24:36Z2022-09-15T18:31:26ZIllinois, Winchester quadrangleRelief shown by contours and spot heights.University of Illinois at Urbana-Champaign Librarytag:digital.library.illinois.edu,2005:Item/669252016-11-15T17:24:57Z2022-09-15T18:31:28ZIllinois, Gibson City quadrangleRelief shown by contours and spot heights.University of Illinois at Urbana-Champaign Library