@misc{indiciae60aea5a16aa8,
  title = {A Liquefier for Mars Surface Propellant Production},
  author = {Salerno, Lou J. and Helvensteijn, B. P. M. and Kittel, P. and Arnold, James O.},
  year = {1999},
  url = {https://ntrs.nasa.gov/citations/20020023715},
  note = {Source identifier: 20020023715}
}