@misc{indiciae2d62a3d30d5d,
  title = {HPGLUTIL, a computer program for processing Hewlett-Packard graphics language (HPGL) files and registering plots to basemaps},
  author = {V. S. Williams and G.I. Selner},
  year = {1994},
  doi = {10.3133/ofr94284},
  url = {https://pubs.usgs.gov/publication/ofr94284},
  note = {Source identifier: ofr94284}
}