@misc{indiciaec0823a1e8c55,
  title = {Precision Thickness Variation Mapping via One-Transducer Ultrasonic High Resolution Profilometry for Sample with Irregular or Rough Surface},
  author = {Roth, Don J.},
  year = {1997},
  url = {https://ntrs.nasa.gov/citations/19980037597},
  note = {Source identifier: 19980037597}
}