@misc{indiciae0e45602343b0,
  title = {Planetary explorer liquid propulsion study},
  author = {Mckevitt, F. X. and Eggers, R. F. and Bolz, C. W.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19720004053},
  note = {Source identifier: 19720004053}
}