@misc{indiciae3fed3a7b0038,
  title = {Computer programs for plane collisionless sheaths between field-modified emitter and thermally ionized plasma exemplified by cesium},
  author = {Button, S. L. and Morris, J. F.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19680012030},
  note = {Source identifier: 19680012030}
}