@misc{indiciae16ffe8c77c75,
  title = {Geologic map of the Winona Quadrangle, Shannon County, Missouri},
  author = {R. C. Orndorff and R.W. Harrison},
  year = {2001},
  doi = {10.3133/i2749},
  url = {https://pubs.usgs.gov/publication/i2749},
  note = {Source identifier: i2749}
}