@misc{indiciae7ca54319301f,
  title = {Technology needs development and orbital support requirements for manned lunar and Mars missions},
  author = {Brender, Karen D. and Llewellyn, Charles P.},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19910043039},
  note = {Source identifier: 19910043039}
}