@misc{indiciae4485f2786edd,
  title = {Reverberations in echocardiograms.},
  author = {E L Yeh},
  year = {1977},
  doi = {10.1002/jcu.1870050207},
  url = {https://pubmed.ncbi.nlm.nih.gov/404332/},
  note = {Source identifier: 404332}
}