@misc{indiciae52258af5badc,
  title = {Structure contour map on top of the Canyon Coal Bed, Birney 30' x 60' Quadrangle, Big Horn, Rosebud, and Powder River counties, Montana},
  author = {L. N. Robinson and William C. Culbertson},
  year = {1984},
  doi = {10.3133/coal96a},
  url = {https://pubs.usgs.gov/publication/coal96A},
  note = {Source identifier: coal96A}
}