@misc{indiciae7db24950c5e6,
  title = {Noncontacting valve-position indicator},
  author = {Crovella, E. A. and Cummins, R. D. and Wada, J. M.},
  year = {1979},
  url = {https://ntrs.nasa.gov/citations/19780000412},
  note = {Source identifier: 19780000412}
}