@misc{indiciae463f30abecfe,
  title = {Two-Element Transducer for Ultrasound},
  author = {Lecroissette, D. H. and Heyser, R. C.},
  year = {1986},
  url = {https://ntrs.nasa.gov/citations/19860000202},
  note = {Source identifier: 19860000202}
}