@misc{indiciae9d0c598b6e3b,
  title = {CONCEPT FOR A MANNED MARS EXPEDITION WITH ELECTRICALLY PROPELLED VEHICLES},
  author = {King, J. C. and Stuhlinger, E.},
  year = {1963},
  url = {https://ntrs.nasa.gov/citations/19630029899},
  note = {Source identifier: 19630029899}
}