@misc{indiciae22dc4066904f,
  title = {Geologic map of the Dongola Quadrangle, Bollinger and Stoddard counties, Missouri},
  author = {D.H. Amos},
  year = {1981},
  doi = {10.3133/mf1363},
  url = {https://pubs.usgs.gov/publication/mf1363},
  note = {Source identifier: mf1363}
}