@misc{indiciae6ef9776a7c9c,
  title = {Phonocardiographic method of assessing changes in left ventricular function after Starr-Edwards replacement of aortic valve.},
  author = {D G Gibson and G Broder and E Sowton},
  year = {1970},
  doi = {10.1136/hrt.32.2.142},
  url = {https://pubmed.ncbi.nlm.nih.gov/5440511/},
  note = {Source identifier: 5440511}
}