@misc{indiciae2c15fcfe0a4f,
  title = {Twenty-fifth annual report of the director of the United States Geological Survey, 1903-1904},
  author = {Charles D. Walcott},
  year = {1903},
  doi = {10.3133/ar25},
  url = {https://pubs.usgs.gov/publication/ar25},
  note = {Source identifier: ar25}
}