@misc{indiciae148455b34df2,
  title = {A practical stethoscope approximator.},
  author = {W R Ploss and R E Ploss},
  year = {1969},
  doi = {10.1097/00000542-196903000-00024},
  url = {https://pubmed.ncbi.nlm.nih.gov/5778105/},
  note = {Source identifier: 5778105}
}