tag:digital.library.illinois.edu,2005:/items/c3a1feb0-c451-0133-1d17-0050569601ca-cCobden, Union County, Illinois, October 19102023-12-12T22:50:31Ztag:digital.library.illinois.edu,2005:Item/314912016-08-03T21:14:48Z2023-12-12T22:50:31ZCobden, Union County, Illinois, October 1910Sheet 1 includes symbol key, index, and index map.University of Illinois at Urbana-Champaign Library