@misc{indiciaeef1b0039f4e3,
  title = {Coal resource occurrence and coal development potential maps of the Bear Creek School quadrangle, Powder River County, Montana},
  author = {E. J. McKay and B. A. Butler and Laura N. Robinson},
  year = {1979},
  doi = {10.3133/ofr79106},
  url = {https://pubs.usgs.gov/publication/ofr79106},
  note = {Source identifier: ofr79106}
}