@misc{indiciaeced019a2042a,
  title = {Space shuttle auxiliary propulsion system design study. Phase A report: Requirements definition},
  author = {Orton, G. F. and Schweickert, T. F.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19730011101},
  note = {Source identifier: 19730011101}
}