@misc{indiciae70f873ff71ea,
  title = {Electronic subtraction.},
  author = {H Wallman and I Wickbom},
  year = {1966},
  doi = {10.1177/02841851660050p161},
  url = {https://pubmed.ncbi.nlm.nih.gov/5957858/},
  note = {Source identifier: 5957858}
}