@misc{indiciae640eb9cc6afc,
  title = {Physical stratigraphy and mineral resources of Permian rocks in western Wyoming},
  author = {Richard Porter Sheldon},
  year = {1963},
  doi = {10.3133/pp313b},
  url = {https://pubs.usgs.gov/publication/pp313B},
  note = {Source identifier: pp313B}
}