tag:digital.library.illinois.edu,2005:/items/48eb1400-4713-0136-4f2e-0050569601ca-3Illinois, Petersburg quadrangle2022-09-15T18:31:58Ztag:digital.library.illinois.edu,2005:Item/1971642018-05-31T15:31:28Z2022-09-15T18:31:58ZIllinois, Petersburg quadrangleShows roadway classification as of 1937.University of Illinois at Urbana-Champaign Library