@misc{indiciae8d86b4f73e3e,
  title = {Stratigraphy and coal geology of the lower part of the Fort Union Formation in the Grass Creek coal mine area, southwestern Bighorn Basin, Wyoming},
  author = {Stephen B. Roberts and Dominique Bossiroy},
  year = {1995},
  doi = {10.3133/coal146},
  url = {https://pubs.usgs.gov/publication/coal146},
  note = {Source identifier: coal146}
}