@misc{indiciaed8137e1f03f8,
  title = {CALGRAD; an interactive program in BASIC for the calibration of gamma-ray spectrometers},
  author = {F.B. Zelt},
  year = {1984},
  doi = {10.3133/ofr84790},
  url = {https://pubs.usgs.gov/publication/ofr84790},
  note = {Source identifier: ofr84790}
}