@misc{indiciae25f65881f8d5,
  title = {Portable low-frequency vibration measuring and recording system},
  author = {Clevenson, S. A. and Dibble, A. C.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19710000125},
  note = {Source identifier: 19710000125}
}