@misc{indiciaee09cd251e3a9,
  title = {Computer-aided design of three-port waveguide junction circulators},
  author = {Castillo, J. B., Jr. and Davis, L. E.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19700046594},
  note = {Source identifier: 19700046594}
}