@misc{indiciae65ecf1f3879c,
  title = {Rectified phonocardiography.},
  author = {A GRISHMAN and R ENTHOVEN and P J LEVESQUE},
  year = {1962},
  doi = {10.1016/0002-9149(62)90182-0},
  url = {https://pubmed.ncbi.nlm.nih.gov/13950579/},
  note = {Source identifier: 13950579}
}