@misc{indiciae7395091230fd,
  title = {Coal and natural gas in northern La Flore County, Oklahoma},
  author = {M. M. Knechtel and W.J. Souder},
  year = {1944},
  doi = {10.3133/ofr4457},
  url = {https://pubs.usgs.gov/publication/ofr4457},
  note = {Source identifier: ofr4457}
}