tag:digital.library.illinois.edu,2005:/itemsItems2022-09-15T18:31:27Ztag:digital.library.illinois.edu,2005:Item/668952016-11-15T17:24:44Z2022-09-15T18:31:27ZIllinois-Indiana, Birds quadrangle : topographyRelief shown by contours and spot heights.University of Illinois at Urbana-Champaign Librarytag:digital.library.illinois.edu,2005:Item/668892016-11-15T17:24:42Z2022-09-15T18:31:27ZIllinois (Warren County), Monmouth quadrangleContour interval 20 feet.University of Illinois at Urbana-Champaign Librarytag:digital.library.illinois.edu,2005:Item/668882016-11-15T17:24:41Z2022-09-15T18:31:27ZIllinois, Tallula quadrangle : topographyRelief indicated by contours and spot heights.University of Illinois at Urbana-Champaign Librarytag:digital.library.illinois.edu,2005:Item/668902016-11-15T17:24:42Z2022-09-15T18:31:27ZIllinois, Equality quadrangle : topographyRelief shown by contours and spot heights.University of Illinois at Urbana-Champaign Librarytag:digital.library.illinois.edu,2005:Item/668852016-11-15T17:24:40Z2022-09-15T18:31:27ZKentucky-Illinois Golconda quadrangle : topographyRelief shown by contours and spot heights.University of Illinois at Urbana-Champaign Librarytag:digital.library.illinois.edu,2005:Item/668862016-11-15T17:24:40Z2022-09-15T18:31:27ZIllinois Hardinville quadrangle : topographyRelief shown by contours and spot heights.University of Illinois at Urbana-Champaign Library