@misc{indiciaee05a6cc19aee,
  title = {Thermionic cathode evaluation study Annual report, 1 Jan. 1967 - 31 Mar. 1968},
  author = {Hill, F. T.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19680028529},
  note = {Source identifier: 19680028529}
}