4 Illinois. Dept. of Natural Resources. Office of Scientific Research and Analysis Illinois. Dept. of Natural Resources Critical Trends Assessment Project Illinois State Geological Survey Natural resources conservation areas Natural resources surveys "The Illinois River Bluffs Area Assessment examines an area in west-central Illinois that includes parts of the upper and lower Illinois River watersheds from the vicinity of Hennepin southward to East Peoria ... designated a state Resource Rich Area."--P. iii "Critical Trends Assessment Program."--Cover Includes bibliographical references v. 1. Geology -- v. 2. Water resources -- v. 3. Living resources -- v. 4. Socio-economic profile. Environmental quality. Archaeological resources -- v. 5. Early accounts of the ecology of the Illinois River Bluffs Area Springfield, Ill. : Illinois Dept. of Natural Resources 1998 eng lr University of Illinois Urbana-Champaign University of Illinois Urbana-Champaign il texts 4053424 4 2010-08-26 13:59:31 NicoleB-loader illinoisriverblu04illi nicole.b@archive.org 2010-08-26 13:59:33 2010-08-26 13:59:36 400 Canon 5D scanner-karen-maher@archive.org scribe2.il.archive.org 20100903183444 166 0 http://www.archive.org/details/illinoisriverblu04illi ark:/13960/t7dr3mc11 0010 [curator]callie@archive.org[/curator][date]20100908182321[/date][state]approved[/state] 20100930 biodiversity americana 1998 ia903606_7 urn:oclc:record:809923306 Thu Dec 24 17:39:17 UTC 2020 39165585 Illinois. Dept. of Natural Resources; Critical Trends Assessment Project; Illinois State Geological Survey tesseract 5.3.0-3-g9920 -l eng 0.0.20 Latin 0.7004 en 1.0000 0.0.22 61 1.0.5