@misc{indiciae88520491f911,
  title = {Geologic map and coal sections of the Pine Ridge Quadrangle, Moffat County, Colorado},
  author = {G.L. Prost and Michael E. Brownfield},
  year = {1983},
  doi = {10.3133/ofr83633},
  url = {https://pubs.usgs.gov/publication/ofr83633},
  note = {Source identifier: ofr83633}
}