@misc{indiciae5fef5f6ac2a7,
  title = {Thermionic cathode evaluation, study Interim report, Jul. 1 - Sep. 30, 1967},
  author = {Hill, F. T.},
  year = {1967},
  url = {https://ntrs.nasa.gov/citations/19680001633},
  note = {Source identifier: 19680001633}
}