@misc{indiciae3b538045f6f7,
  title = {RFM (relative fraction magnitude): program explanation and computer program listing},
  author = {Henry V. Alminas and George Van Trump},
  year = {1978},
  doi = {10.3133/ofr781013},
  url = {https://pubs.usgs.gov/publication/ofr781013},
  note = {Source identifier: ofr781013}
}