TY - RPRT TI - Geosoft eXecutables (GX's) developed by the U.S. Geological Survey, version 1.0, with a viewgraph tutorial on GX development AU - Jeffrey D. Phillips AU - Joseph S. Duval AU - Richard W. Saltus PY - 2003 DO - 10.3133/ofr0310 UR - https://pubs.usgs.gov/publication/ofr0310 ID - ofr0310 ER -