@misc{indiciaed3ef2a661ff0,
  title = {Coal resources of Oregon},
  author = {Ralph S. Mason and Margaret Isabelle Erwin},
  year = {1955},
  doi = {10.3133/cir362},
  url = {https://pubs.usgs.gov/publication/cir362},
  note = {Source identifier: cir362}
}