tag:digital.library.illinois.edu,2005:/items/91afde70-82d4-0134-1f08-0050569601ca-e
Illinois, Carbondale quadrangle : topography
2022-09-15T18:31:18Z
tag:digital.library.illinois.edu,2005:Item/66735
2016-11-15T17:23:52Z
2022-09-15T18:31:18Z
Illinois, Carbondale quadrangle : topography
Contour interval 20 feet.
University of Illinois at Urbana-Champaign Library