@misc{indiciae0d9cc6a3cc51,
  title = {Manned Mars landing missions using electric propulsion},
  author = {Fishbach, L. H. and Hrach, F. J. and Mac Kay, J. S. and Rossa, L. G. and Strack, W. C. and Zola, C. L.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19660005412},
  note = {Source identifier: 19660005412}
}