@misc{indiciaeb43e7b8c5bab,
  title = {Segmented ball valve is easy to open and close},
  author = {Prono, E. and Shinault, L. H. and Speisman, C.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19660000194},
  note = {Source identifier: 19660000194}
}