@misc{indiciae3f0c2f85220c,
  title = {A program in Hewlett-Packard BASIC for X-Y plotting and line-fitting of isotopic and other data},
  author = {K.R. Ludwig},
  year = {1979},
  doi = {10.3133/ofr791641},
  url = {https://pubs.usgs.gov/publication/ofr791641},
  note = {Source identifier: ofr791641}
}