@misc{indiciaee8d7fef9fd0d,
  title = {A simple ternary/quaternary plotting program for microcomputers},
  author = {J. T. O’Connor},
  year = {1987},
  doi = {10.3133/ofr87171},
  url = {https://pubs.usgs.gov/publication/ofr87171},
  note = {Source identifier: ofr87171}
}