@misc{indiciaebd3c7f6d28a9,
  title = {A study of electrical propulsion in the space program},
  author = {Pinkel, B. and Trapp, D. L.},
  year = {1964},
  url = {https://ntrs.nasa.gov/citations/19640017079},
  note = {Source identifier: 19640017079}
}