@misc{indiciae93cd09ae428f,
  title = {Map projections},
  author = {Tau Rho Alpha and Daan Strebe},
  year = {1991},
  doi = {10.3133/ofr91553a},
  url = {https://pubs.usgs.gov/publication/ofr91553A},
  note = {Source identifier: ofr91553A}
}