@misc{indiciae538ac5fe402a,
  title = {Petrographic characteristics of the Wyodak-Anderson coal bed (Paleocene), Powder River Basin, Wyoming, U.S.A.},
  author = {Peter D. Warwick and Ronald W. Stanton},
  year = {1988},
  doi = {10.1016/0146-6380(88)90012-5},
  url = {https://pubs.usgs.gov/publication/70014396},
  note = {Source identifier: 70014396}
}