@misc{indiciae7f3be9b5fb34,
  title = {Thermionic cathode evaluation study Interim report, 1 Apr. - 30 Jun. 1968},
  author = {Hill, F. T.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19680027111},
  note = {Source identifier: 19680027111}
}