@misc{indiciae207f26292e6a,
  title = {Geochemical evolution of water in the Madison Aquifer in parts of Montana, South Dakota, and Wyoming},
  author = {J.F. Busby and Niel Plummer and R. W. Lee and B.B. Hanshaw},
  year = {1991},
  doi = {10.3133/pp1273f},
  url = {https://pubs.usgs.gov/publication/pp1273F},
  note = {Source identifier: pp1273F}
}