@misc{indiciae8d9d8b7496a3,
  title = {Nineteenth annual report of the United States Geological Survey to the Secretary of the Interior 1897 - 1898: Part I. Director's report, including triangulation and spirit leveling},
  author = {Charles D. Walcott},
  year = {1898},
  doi = {10.3133/ar19},
  url = {https://pubs.usgs.gov/publication/ar19},
  note = {Source identifier: ar19}
}