@misc{indiciae8663d38f096f,
  title = {Eighteenth annual report of the United States Geological Survey to the Secretary of the Interior, 1896-1897: Part I - Director's report, including triangulation and spirit leveling},
  author = {Charles D. Walcott},
  year = {1897},
  doi = {10.3133/ar18\_1},
  url = {https://pubs.usgs.gov/publication/ar18\_1},
  note = {Source identifier: ar18\_1}
}