@misc{indiciae5e8775fbf0e8,
  title = {Groundwater quality in the Cambrian-Ordovician aquifer system, midwestern United States},
  author = {Paul E. Stackelberg},
  year = {2017},
  doi = {10.3133/fs20173056},
  url = {https://pubs.usgs.gov/publication/fs20173056},
  note = {Source identifier: fs20173056}
}