@misc{indiciaef39ba4d11bf9,
  title = {Formulas and tables for the construction of polyconic projections},
  author = {Claude Hale Birdseye},
  year = {1929},
  doi = {10.3133/b809},
  url = {https://pubs.usgs.gov/publication/b809},
  note = {Source identifier: b809}
}