@misc{indiciae00c417bb5651,
  title = {A contour plotting device.},
  author = {J Legal and A F Holloway and K Breitman},
  year = {1971},
  doi = {10.2214/ajr.111.1.182},
  url = {https://pubmed.ncbi.nlm.nih.gov/5540925/},
  note = {Source identifier: 5540925}
}