tag:digital.library.illinois.edu,2005:/items/9187a330-82d4-0134-1f08-0050569601ca-f
Illinois, Greenfield quadrangle
2022-09-15T18:31:18Z
tag:digital.library.illinois.edu,2005:Item/66733
2016-11-15T17:23:51Z
2022-09-15T18:31:18Z
Illinois, Greenfield quadrangle
Contour interval 10 feet.
University of Illinois at Urbana-Champaign Library