@misc{indiciae7cdb0bb31d5d,
  title = {The diacardiac phonogram.},
  author = {P HEINTZEN and K W VIETOR},
  year = {1963},
  doi = {10.1016/0002-8703(63)90214-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/13953473/},
  note = {Source identifier: 13953473}
}