@misc{indiciaefba6ece6fbcf,
  title = {Plural beam antenna},
  author = {Keller, G. C. and Maxwell, M. S. and Dod, L. R.},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19730010507},
  note = {Source identifier: 19730010507}
}