@misc{indiciae85d60ebd09de,
  title = {Manned Mars Mission. Working group papers, volume 2, section 5 - appendix},
  author = {Michael B Duke and Paul W Keaton},
  year = {1986},
  url = {https://ntrs.nasa.gov/citations/19870008327},
  note = {Source identifier: 19870008327}
}