@misc{indiciae97cffcd3497b,
  title = {Geologic map and coal sections of the Bar N Draw Quadrangle, Wyoming and Montana},
  author = {W. J. Mapel},
  year = {1976},
  doi = {10.3133/mf763},
  url = {https://pubs.usgs.gov/publication/mf763},
  note = {Source identifier: mf763}
}