@misc{indiciae00eb8de805bf,
  title = {Graphs showing linear to fractional scale conversions for maps},
  author = {T. R. Alpha and D.W. Poole},
  year = {1979},
  doi = {10.3133/mf1141},
  url = {https://pubs.usgs.gov/publication/mf1141},
  note = {Source identifier: mf1141}
}