@misc{indiciaec3adbbb48a7c,
  title = {Myocardium wall thickness transducer and measuring method},
  author = {Feldstein, C. and Lewis, G. W. and Silver, R. H. and Culler, V. H.},
  year = {1976},
  url = {https://ntrs.nasa.gov/citations/19760022807},
  note = {Source identifier: 19760022807}
}