@misc{indiciaecec003635825,
  title = {Water levels and artesian pressure in observation wells in the United States, 1940, Part 3, North-Central States},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1942},
  doi = {10.3133/wsp908},
  url = {https://pubs.usgs.gov/publication/wsp908},
  note = {Source identifier: wsp908}
}