@misc{indiciae617511428659,
  title = {Preliminary geologic map and coal sections of the Bar N Draw Quadrangle, Wyoming-Montana},
  author = {W. J. Mapel},
  year = {1974},
  doi = {10.3133/ofr7463},
  url = {https://pubs.usgs.gov/publication/ofr7463},
  note = {Source identifier: ofr7463}
}