@misc{indiciaefd775dcb835f,
  title = {A direct-conversion device using thermally- accelerated, charged colloidal particles},
  author = {Leon, H. I. and Mickelsen, W. R.},
  year = {1967},
  url = {https://ntrs.nasa.gov/citations/19670027619},
  note = {Source identifier: 19670027619}
}