@misc{indiciae0395bccb6a0f,
  title = {Summary of ground-water hydrology of the Cambrian-Ordovician aquifer system in the northern Midwest, United States},
  author = {H. L. Young},
  year = {1992},
  doi = {10.3133/pp1405a},
  url = {https://pubs.usgs.gov/publication/pp1405A},
  note = {Source identifier: pp1405A}
}