@misc{indiciae14a97c48a844,
  title = {Thirty-sixth annual report of the Director of the United States Geological Survey},
  author = {George Otis Smith},
  year = {1915},
  doi = {10.3133/ar36},
  url = {https://pubs.usgs.gov/publication/ar36},
  note = {Source identifier: ar36}
}