@misc{indiciae3c155cf12ee1,
  title = {Nineteenth Annual Report of the United States Geological Survey to the Secretary of the Interior 1897 - 1898: Part II - Papers Chiefly of a Theoretic Nature},
  author = {Charles D. Walcott},
  year = {1899},
  doi = {10.3133/ar19\_2},
  url = {https://pubs.usgs.gov/publication/ar19\_2},
  note = {Source identifier: ar19\_2}
}