@misc{indiciae18eb8d9f66b8,
  title = {Stratigraphy and paleontology in the Simpson area, November 1948},
  author = {H.J. Plummer},
  year = {1954},
  doi = {10.3133/ofr54245},
  url = {https://pubs.usgs.gov/publication/ofr54245},
  note = {Source identifier: ofr54245}
}