@misc{indiciae4f3079b59db2,
  title = {Fifty-ninth annual report of the Director of the Geological Survey},
  author = {Walter Curran Mendenhall},
  year = {1938},
  doi = {10.3133/ar59},
  url = {https://pubs.usgs.gov/publication/ar59},
  note = {Source identifier: ar59}
}