@misc{indiciae12ade34867c4,
  title = {Geology and fuel resources of the southern part of the Oklahoma coal field. Part 1, The McAlester district, Pittsburg, Atoka, and Latimer Counties},
  author = {T. A. Hendricks},
  year = {1937},
  doi = {10.3133/b874a},
  url = {https://pubs.usgs.gov/publication/b874A},
  note = {Source identifier: b874A}
}