@misc{indiciaef971e30c22fa,
  title = {Preliminary geologic map and coal resources of the Decker Quadrangle, Big Horn County, Montana},
  author = {B. E. Law and S.L. Grazia},
  year = {1972},
  doi = {10.3133/ofr72220},
  url = {https://pubs.usgs.gov/publication/ofr72220},
  note = {Source identifier: ofr72220}
}