@misc{indiciaef3b4d04903d8,
  title = {GSMAP system version 7.0; graphics programs and related utility programs for the IBM PC and compatible microcomputers to assist compilation and publication of geologic maps and illustrations using geodetic or Cartesian coordinates},
  author = {Gary I. Selner and Richard B. Taylor},
  year = {1991},
  doi = {10.3133/ofr911b},
  url = {https://pubs.usgs.gov/publication/ofr911B},
  note = {Source identifier: ofr911B}
}