@misc{indiciaea2ce8e6518fa,
  title = {Ground water near Pella and in selected parts of Jasper, Mahaska and Marion Counties, Iowa},
  author = {James P. Caldwell and Eric M. Sadorf},
  year = {2002},
  doi = {10.3133/wri024118},
  url = {https://pubs.usgs.gov/publication/wri024118},
  note = {Source identifier: wri024118}
}