@misc{1188436,
  author = {P Heydemann},
  title = {Ultrasonic interferometer manometer:},
  year = {1974},
  month = {1974-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.IR.74-566},
  language = {en},
}