@misc{indiciae4d4bc5a9d8fb,
  title = {Electric Propulsion Options for Mars Cargo Missions},
  author = {Hoffman, Nathan J. and Frisbee, Robert H.},
  year = {1996},
  url = {https://ntrs.nasa.gov/citations/20210003758},
  note = {Source identifier: 20210003758}
}