1994. Herzog, B.L., B.J. Stiff, C.A. Chenoweth, K.L. Warner, J.B. Sievering, and C. Avery. Topography of the bedrock surface in Illinois. Bedrock topography is shown as 50-foot (15-meter) contours of bedrock elevation above mean sea level... Illinois State Geological Survey.
You searched for: Creator B.J. Stiff Remove constraint Creator: B.J. Stiff Provider University of Illinois Urbana-Champaign Remove constraint Provider: University of Illinois Urbana-Champaign Time Period 1950-1999 Remove constraint Time Period: 1950-1999