@misc{indiciae773f6bbe6d7d,
  title = {Twenty-eighth annual report of the Director of the United States Geological Survey},
  author = {George Otis Smith},
  year = {1907},
  doi = {10.3133/ar28},
  url = {https://pubs.usgs.gov/publication/ar28},
  note = {Source identifier: ar28}
}