@misc{indiciae3c133dfb8a23,
  title = {Applied thermionic research Quarterly progress report, 4 Dec. 1967 - 4 Mar. 1968},
  author = {Fraim, F. and Gyftopoulos, E. P. and Hatsopoulos, G. N. and Holly, F. and Lieb, D. and Rufeh, F. and Van Someren, L. and Wang, C.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19680016147},
  note = {Source identifier: 19680016147}
}