@misc{indiciae581887cc4aa3,
  title = {Geologic map of the Jackson Quadrangle, Cape Girardeau County, Missouri},
  author = {D.H. Amos},
  year = {1987},
  doi = {10.3133/mf1935},
  url = {https://pubs.usgs.gov/publication/mf1935},
  note = {Source identifier: mf1935}
}