@misc{indiciae5aa99217797b,
  title = {Design of a network for monitoring ground-water quality in Minnesota},
  author = {Marc F. Hult},
  year = {1979},
  doi = {10.3133/ofr791164},
  url = {https://pubs.usgs.gov/publication/ofr791164},
  note = {Source identifier: ofr791164}
}