@misc{indiciaea17ed1bebc40,
  title = {Geosoft eXecutables (GX's) developed by the U.S. Geological Survey, version 1.0, with a viewgraph tutorial on GX development},
  author = {Jeffrey D. Phillips and Joseph S. Duval and Richard W. Saltus},
  year = {2003},
  doi = {10.3133/ofr0310},
  url = {https://pubs.usgs.gov/publication/ofr0310},
  note = {Source identifier: ofr0310}
}