@misc{indiciae313814b2c273,
  title = {Thermionic cathode evaluation study Interim report, 1 Jul. - 30 Sep. 1968},
  author = {Hill, F. T.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19690005578},
  note = {Source identifier: 19690005578}
}