@misc{indiciaec5f7ba915725,
  title = {Index map of central midcontinent region giving lines of sections that show detailed lithology of Paleozoic and Mesozoic rocks},
  author = {Jeannette Fox and Mary G. Sheldon},
  year = {1957},
  doi = {10.3133/om184},
  url = {https://pubs.usgs.gov/publication/om184},
  note = {Source identifier: om184}
}