@misc{indiciae563e283fd872,
  title = {GEOPLOT, an advanced graphics package for minicomputers; Part I, User's guide},
  author = {P.L. Ward},
  year = {1983},
  doi = {10.3133/ofr83807a},
  url = {https://pubs.usgs.gov/publication/ofr83807A},
  note = {Source identifier: ofr83807A}
}