@misc{indiciae7524c04a61d2,
  title = {Ring cusp/hollow cathode discharge chamber performance studies},
  author = {Vaughn, J. A. and Wilbur, P. J.},
  year = {1988},
  url = {https://ntrs.nasa.gov/citations/19890060097},
  note = {Source identifier: 19890060097}
}