@misc{indiciae27b6fb961e54,
  title = {Echocardiography.},
  author = {B L Segal},
  year = {1967},
  doi = {10.1159/000169172},
  url = {https://pubmed.ncbi.nlm.nih.gov/4864938/},
  note = {Source identifier: 4864938}
}