tag:digital.library.illinois.edu,2005:/items/a3ffe700-994e-0134-2096-0050569601ca-7
Illinois-Iowa, Edgington quadrangle : topography
2022-09-15T18:31:54Z
tag:digital.library.illinois.edu,2005:Item/70056
2016-11-30T19:20:05Z
2022-09-15T18:31:54Z
Illinois-Iowa, Edgington quadrangle : topography
Contour interval 20 feet.
University of Illinois at Urbana-Champaign Library