@misc{indiciae93ba7f4a2c52,
  title = {Echocardiography in the flight program},
  author = {Charles, John B. and Bungo, Michael W. and Mulvagh, Sharon L.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19940007521},
  note = {Source identifier: 19940007521}
}