@misc{indiciae3b2113009360,
  title = {GSPOST Version 2.0; a program to plot symbols and post numerical data from ASCII tables providing latitude and longitude coordinates, and GSPXY, Version 1.0, a counterpart program working from X, Y coordinates, using an IBM PC (or compatible) microcomputer and plotter},
  author = {Gary I. Selner and Cole L. Smith and Richard B. Taylor},
  year = {1988},
  doi = {10.3133/ofr88413b},
  url = {https://pubs.usgs.gov/publication/ofr88413B},
  note = {Source identifier: ofr88413B}
}