@misc{indiciaede581af68193,
  title = {Dual frequency microwave reflex feed},
  author = {Bathker, D. A. and Brunstein, S. A. and Ludwig, A. C.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19730003487},
  note = {Source identifier: 19730003487}
}