@misc{indiciaee4ed2200fb6d,
  title = {Pulsed plasma thruster backflow characteristics},
  author = {Rudolph, L. K. and Pless, L. C. and Harstad, K. G.},
  year = {1979},
  url = {https://ntrs.nasa.gov/citations/19790055010},
  note = {Source identifier: 19790055010}
}