@misc{indiciaecb0d9c3f936a,
  title = {Removing freon gas from hydraulic fluid},
  author = {Williams, B. B. and Mitchell, S. M. and State, T. S.},
  year = {1981},
  url = {https://ntrs.nasa.gov/citations/19800000494},
  note = {Source identifier: 19800000494}
}