@misc{indiciae0076f5d424ac,
  title = {Instrumentation--past and present.},
  author = {P M Broughton},
  year = {1974},
  doi = {10.1177/000456327401100147},
  url = {https://pubmed.ncbi.nlm.nih.gov/4441050/},
  note = {Source identifier: 4441050}
}