@misc{indiciaead8c0bc7f7f2,
  title = {Pulse-Echo Ultrasonic Imaging Method for Eliminating Sample Thickness Variation Effects},
  author = {Roth, Don J.},
  year = {1997},
  url = {https://ntrs.nasa.gov/citations/19970023896},
  note = {Source identifier: 19970023896}
}