@misc{indiciae6c824ac46b8a,
  title = {Geologic map and coal sections of the Lay SE Quadrangle, Moffat County, Colorado},
  author = {Michael E. Brownfield and Kevin Anderson},
  year = {1979},
  doi = {10.3133/ofr791680},
  url = {https://pubs.usgs.gov/publication/ofr791680},
  note = {Source identifier: ofr791680}
}