@misc{indiciae93425fdee009,
  title = {Twentieth Annual report of the United States Geological Survey, 1898-1899: Part II - General geology and paleontology},
  author = {Charles D. Walcott},
  year = {1900},
  doi = {10.3133/ar20\_2},
  url = {https://pubs.usgs.gov/publication/ar20\_2},
  note = {Source identifier: ar20\_2}
}