@misc{indiciaebdd07155cfaa,
  title = {Echocardiography.},
  author = {C P Roy and M Durairaj and N R Krishnan and A R Subramanian and M M Ghosh},
  year = {1981},
  url = {https://pubmed.ncbi.nlm.nih.gov/7341685/},
  note = {Source identifier: 7341685}
}