@misc{indiciae9ececcd0a25e,
  title = {Geologic map of the Whitewater Quadrangle, southeastern Missouri},
  author = {D.H. Amos},
  year = {1981},
  doi = {10.3133/mf1256},
  url = {https://pubs.usgs.gov/publication/mf1256},
  note = {Source identifier: mf1256}
}