@misc{indiciaeac268dbc4e07,
  title = {Coal resource and coal quality of Pumpkin Creek EMRIA site, Powder River County, Montana: With a section on chemical analysis},
  author = {Marguerite Glenn and Joseph R. Hatch and Ronald H. Affolter},
  year = {1979},
  doi = {10.3133/ofr79589},
  url = {https://pubs.usgs.gov/publication/ofr79589},
  note = {Source identifier: ofr79589}
}