@misc{indiciae5be35c503acd,
  title = {Geohydrology of bedrock aquifers in the Northern Great Plains in parts of Montana, North Dakota, South Dakota, and Wyoming},
  author = {J. S. Downey},
  year = {1986},
  doi = {10.3133/pp1402e},
  url = {https://pubs.usgs.gov/publication/pp1402E},
  note = {Source identifier: pp1402E}
}