@misc{indiciae7d822006703f,
  title = {Adjustable Tuning Spring for Bellows Pump},
  author = {Green, G. L. and Tu Duc, D. and Hooper, S.},
  year = {1985},
  url = {https://ntrs.nasa.gov/citations/19840000378},
  note = {Source identifier: 19840000378}
}