@misc{indiciae527d85a1e5c6,
  title = {PBDAT for MS-DOS; a computer program for IBM-PC compatibles for processing raw Pb-U-Th isotope data, version 1.00a},
  author = {K.R. Ludwig},
  year = {1988},
  doi = {10.3133/ofr88542},
  url = {https://pubs.usgs.gov/publication/ofr88542},
  note = {Source identifier: ofr88542}
}