@misc{indiciaeb7d56b540f47,
  title = {Extraterrestrial cryogenic propellants reliquefaction.},
  author = {Middleton, R. L. and Sedgwick, T. A.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19660057789},
  note = {Source identifier: 19660057789}
}