@misc{indiciaeb6f88cc7b18b,
  title = {Grid electrode ion rockets for low specific impulse missions},
  author = {Childs, J. H. and Mickelsen, W. R.},
  year = {1959},
  url = {https://ntrs.nasa.gov/citations/19640057800},
  note = {Source identifier: 19640057800}
}