@misc{indiciae17601e6f89ec,
  title = {Transportation mode performance comparison for a sustained manned Mars base},
  author = {Hoffman, S. J. and Friedlander, A. L. and Nock, K. T.},
  year = {1986},
  url = {https://ntrs.nasa.gov/citations/19860063169},
  note = {Source identifier: 19860063169}
}