@misc{indiciaebd0498cfce1b,
  title = {MATERIAL REQUIREMENTS FOR ION PROPULSION},
  author = {Barcatta, F. and Clark, D. and Todd, H. and Worlock, R.},
  year = {1962},
  url = {https://ntrs.nasa.gov/citations/19630015908},
  note = {Source identifier: 19630015908}
}