@misc{indiciaef13c0404cb39,
  title = {Next generation: In-space transportation system(s)},
  author = {Huffaker, Fredrick and Redus, Jerry and Kelley, David L.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19910018897},
  note = {Source identifier: 19910018897}
}