@misc{1149951,
  author = {Hiroshi Watanabe and Walter J Jr Rossiter},
  title = {Pulse-echo ultrasonic evaluation of the integrity of seams of single-ply roofing membranes::laboratory evaluation of a prototype test apparatus},
  year = {1990},
  month = {1990-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NIST.IR.4424},
  language = {en},
}