@misc{indiciaeb21a47c0ac9b,
  title = {Subsurface geology of Paleozoic, Mesozoic, and Cenozoic units in southeast Missouri},
  author = {T. O. Mesko},
  year = {1988},
  doi = {10.3133/i1875},
  url = {https://pubs.usgs.gov/publication/i1875},
  note = {Source identifier: i1875}
}