@misc{indiciae01eda1d2402b,
  title = {Experimental results of a frequency doubler using a varactor array.},
  author = {Grayzel, A. I. and Parker, D.},
  year = {1967},
  url = {https://ntrs.nasa.gov/citations/19670050447},
  note = {Source identifier: 19670050447}
}