@misc{indiciae5ec91ce9d1d8,
  title = {Beat-Frequency/Microsphere Medical Ultrasonic Imaging},
  author = {Yost, William T. and Cantrell, John H. and Pretlow, Robert A., III},
  year = {1995},
  url = {https://ntrs.nasa.gov/citations/19950065205},
  note = {Source identifier: 19950065205}
}