@misc{indiciae48cef040e195,
  title = {Triangulation and primary traverse, 1913-1915 : Triangulation in California, 1913-1915},
  author = {Robert Bradford Marshall},
  year = {1916},
  doi = {10.3133/b644c},
  url = {https://pubs.usgs.gov/publication/b644C},
  note = {Source identifier: b644C}
}