@misc{indiciae19771bfa4be2,
  title = {Experimental facilities for electric propulsion testing},
  author = {Ruyten, Wilhelmus M. and Friedly, Verlin J. and Peng, Xiaohang and Keefer, Dennis},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19960011788},
  note = {Source identifier: 19960011788}
}