@misc{indiciae736399ec2834,
  title = {System 8. Programs to assist workers in the earth sciences in using geodetic or Cartesian XYZ data from row column (GSPV85) files; GSPDC, contours and grids interpolated from triangulated network; PCS, graphic sections; GSPUV, univariant statistics and histograms; GSPPROB, probability diagrams; GSPXY, regression statistics and XY plots; GSPTD, ternary diagrams; and GSPV85 post-plots, for IBM PC compatible computers},
  author = {G.I. Selner and Richard B. Taylor},
  year = {1992},
  doi = {10.3133/ofr92372b},
  url = {https://pubs.usgs.gov/publication/ofr92372B},
  note = {Source identifier: ofr92372B}
}