@misc{indiciae5dc52ba78f0f,
  title = {Hydrogeologic and water-quality characteristics of glacial-drift aquifers in Minnesota},
  author = {J. F. Ruhl},
  year = {1987},
  doi = {10.3133/wri874224},
  url = {https://pubs.usgs.gov/publication/wri874224},
  note = {Source identifier: wri874224}
}