tag:digital.library.illinois.edu,2005:/items/a8396800-994e-0134-2096-0050569601ca-9Kentucky-Illinois, La Center quadrangle2022-09-15T18:31:57Ztag:digital.library.illinois.edu,2005:Item/701222016-11-30T19:20:25Z2022-09-15T18:31:57ZKentucky-Illinois, La Center quadrangleContour interval 20 feet.University of Illinois at Urbana-Champaign Library