@misc{indiciae63a3e3a3f341,
  title = {Summary of the geology, mineral resources, landscape geochemistry, and engineering geologic characteristics of the northern Powder River coal region, Montana: Landscape geochemistry},
  author = {J. J. Connor},
  year = {1977},
  doi = {10.3133/ofr77292b},
  url = {https://pubs.usgs.gov/publication/ofr77292B},
  note = {Source identifier: ofr77292B}
}