@misc{indiciae4336bc518e7b,
  title = {A SIMPLE AUDIO-CALIBRATED STETHOSCOPE.},
  author = {N S BLACKMAN},
  year = {1964},
  doi = {10.1001/jama.1964.03070100070022},
  url = {https://pubmed.ncbi.nlm.nih.gov/14174062/},
  note = {Source identifier: 14174062}
}