@misc{indiciae5d1805978f48,
  title = {Thermionic tantalum emitter doped with oxygen Patent Application},
  author = {Desteese, J. G. and Luebbers, S. S.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19700025330},
  note = {Source identifier: 19700025330}
}