@misc{indiciaee989708e27c7,
  title = {Triangulations using Phototheodolites},
  author = {Anderson, Abigail A.},
  year = {2020},
  doi = {10.2172/1658696},
  url = {https://www.osti.gov/biblio/1658696},
  note = {Source identifier: 1658696}
}