@misc{indiciaef24b59dfa117,
  title = {Thirty-eighth annual report of the Director of the United States Geological Survey},
  author = {George Otis Smith},
  year = {1917},
  doi = {10.3133/ar38},
  url = {https://pubs.usgs.gov/publication/ar38},
  note = {Source identifier: ar38}
}