@misc{indiciae298b3886c7fb,
  title = {Collimation instruments.},
  author = {T P Croll},
  year = {1987},
  doi = {10.14219/jada.archive.1987.0176},
  url = {https://pubmed.ncbi.nlm.nih.gov/3475354/},
  note = {Source identifier: 3475354}
}