@misc{indiciae8117d8c1f322,
  title = {An advanced contact ion microthruster system.},
  author = {Davis, J. J. and James, E. and Ramirez, P. and Wood, O. and Worlock, R.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690061223},
  note = {Source identifier: 19690061223}
}