@misc{indiciae58acfda1803c,
  title = {Quasioptical circuits relating to frequency multipliers.},
  author = {Kraemer, E. and Kurpis, G. and Taub, J. and Grayzel, A.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19720031951},
  note = {Source identifier: 19720031951}
}