@misc{indiciae5065317148cf,
  title = {HEART SOUNDS.},
  author = {D LITTMANN},
  year = {1964},
  doi = {10.1016/s0011-5029(64)80011-0},
  url = {https://pubmed.ncbi.nlm.nih.gov/14115740/},
  note = {Source identifier: 14115740}
}