@misc{indiciae7fc2f0f11881, title = {U. S. Geological Survey programs in Illinois}, author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey}, year = {1996}, doi = {10.3133/fs01396}, url = {https://pubs.usgs.gov/publication/fs01396}, note = {Source identifier: fs01396} }