@misc{indiciae17cfa515c759,
  title = {Submillimeter backward wave oscillators},
  author = {Dayton, J. A. and Heinen, V. O. and Stankiewicz, N. and Wallett, T. M.},
  year = {1987},
  url = {https://ntrs.nasa.gov/citations/19880032432},
  note = {Source identifier: 19880032432}
}