@misc{indiciaee172c3ee70f3,
  title = {GSDRAW and GSMAP version 5.0; prototype programs, level 5, for the IBM PC and compatible microcomputers, to assist compilation and publication of geologic maps and illustrations; A, Documentation and tutorial},
  author = {Gary I. Selner and Richard B. Taylor},
  year = {1988},
  doi = {10.3133/ofr88295a},
  url = {https://pubs.usgs.gov/publication/ofr88295A},
  note = {Source identifier: ofr88295A}
}