@misc{indiciae1cbf0ef0a7b2,
  title = {Two-step rocket engine bipropellant valve concept},
  author = {Capps, J. E. and Ferguson, R. E. and Pohl, H. O.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690000280},
  note = {Source identifier: 19690000280}
}