@misc{indiciae5ad48cb5bcaf,
  title = {Method and Apparatus for the Portable Identification of Material Thickness and Defects Using Spatially Controlled Heat Application},
  author = {Cramer, K. Elliott and Winfree, William P.},
  year = {1999},
  url = {https://ntrs.nasa.gov/citations/20000030735},
  note = {Source identifier: 20000030735}
}