@misc{indiciae7fb38465e0e8,
  title = {A piezoelectrically actuated ball valve},
  author = {Erwin, L. R. and Schwartz, H. W. and Teitelbaum, B. R.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19720000204},
  note = {Source identifier: 19720000204}
}