@misc{indiciaecbdcc7f2472d,
  title = {Geology of the Michigan basin with reference to subsurface disposal of radioactive wastes},
  author = {Wallace De Witt},
  year = {1961},
  doi = {10.3133/ofr6140},
  url = {https://pubs.usgs.gov/publication/ofr6140},
  note = {Source identifier: ofr6140}
}