@misc{indiciaead7234247534, title = {Water levels and artesian pressures in observation wells in the United States, 1950, Part 3, North-Central States}, author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey}, year = {1952}, doi = {10.3133/wsp1167}, url = {https://pubs.usgs.gov/publication/wsp1167}, note = {Source identifier: wsp1167} }