@misc{indiciae875bb8501d85,
  title = {Thirty-second annual report of the Director of the United States Geological Survey},
  author = {George Otis Smith},
  year = {1911},
  doi = {10.3133/ar32},
  url = {https://pubs.usgs.gov/publication/ar32},
  note = {Source identifier: ar32}
}