@misc{indiciae3b2d42ba3eef,
  title = {Shuttle cryogenics supply system. Optimization study. Volume 5 B-4: Programmers manual for space shuttle orbit injection analysis (SOPSA)},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19730018158},
  note = {Source identifier: 19730018158}
}