@misc{indiciae16db9cd31b24,
  title = {Water-table map of Waukesha County, Wisconsin, December 1971},
  author = {Joseph B. Gonthier},
  year = {1975},
  doi = {10.3133/ofr75571},
  url = {https://pubs.usgs.gov/publication/ofr75571},
  note = {Source identifier: ofr75571}
}