@misc{indiciaed187dec99209,
  title = {A practical ultrasonic plethysmograph.},
  author = {V C Wu and W T Nickell and P K Bhagat},
  year = {1982},
  url = {https://pubmed.ncbi.nlm.nih.gov/7082254/},
  note = {Source identifier: 7082254}
}