@misc{indiciae2ccc7dacd5df,
  title = {Hydrogeologic framework of the Michigan Basin regional aquifer system},
  author = {David B. Westjohn and T. L. Weaver},
  year = {1998},
  doi = {10.3133/pp1418},
  url = {https://pubs.usgs.gov/publication/pp1418},
  note = {Source identifier: pp1418}
}