@misc{indiciae14cf90cc68ed,
  title = {Advanced propulsion options for the Mars cargo mission},
  author = {Frisbee, Robert H. and Blandino, John J. and Sercel, Joel C. and Sargent, Mark S. and Gowda, Nandini},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19900055661},
  note = {Source identifier: 19900055661}
}