@misc{indiciae0189e0dfd140,
  title = {Twenty-Fourth Annual report of the Director of the United States Geological Survey, 1902-1903},
  author = {Charles D. Walcott},
  year = {1903},
  doi = {10.3133/ar24},
  url = {https://pubs.usgs.gov/publication/ar24},
  note = {Source identifier: ar24}
}