@misc{indiciaed6772dc3e303,
  title = {Methods for space propulsion system evaluation.},
  author = {Jennings, C. N. and Phen, R. L. and Zehr, E.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19670033569},
  note = {Source identifier: 19670033569}
}