@misc{indiciae4b69e95ddea8,
  title = {Starting small on the road to Mars},
  author = {Hanel, Robert P. and Hubbard, G. S. and Lemke, Larry G. and Ramos, Ruben and Sarver, George L. and Wercinski, Paul F.},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19920069072},
  note = {Source identifier: 19920069072}
}