@misc{indiciaec973e8e0516c,
  title = {Fifty-eighth annual report of the Director of the Geological Survey},
  author = {Walter Curran Mendenhall},
  year = {1937},
  doi = {10.3133/ar58},
  url = {https://pubs.usgs.gov/publication/ar58},
  note = {Source identifier: ar58}
}