@misc{indiciaea6c53e50acc3,
  title = {HF sideband generation in the ionosphere},
  author = {Noble, S. T. and Gordon, W. E. and Duncan, L. M. and Mccoy, J. E.},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19890056664},
  note = {Source identifier: 19890056664}
}