@misc{indiciae194dca4f445b,
  title = {Application of pressurized liquid nitrogen inside parametric-amplifier structures for input-noise-temperature improvement},
  author = {Blume, H.-J. C.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690030694},
  note = {Source identifier: 19690030694}
}