@misc{indiciae697d30a98115,
  title = {Solid state microwave electronics},
  author = {Penfield, P. L., Jr. and Steinbrecher, D. H. and Chu, A.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19720012591},
  note = {Source identifier: 19720012591}
}