@misc{indiciae745eac209967,
  title = {Grid-coordinate generation program},
  author = {Oliver J. Cosner and Esther Horwich},
  year = {1974},
  doi = {10.3133/ofr741018},
  url = {https://pubs.usgs.gov/publication/ofr741018},
  note = {Source identifier: ofr741018}
}