@misc{indiciaeb66b21b98fb2,
  title = {Determination of intermodulation product amplitudes.},
  author = {Conner, D. A. and Engel, G. M. and Steen, W. J.},
  year = {1967},
  url = {https://ntrs.nasa.gov/citations/19680032975},
  note = {Source identifier: 19680032975}
}