@misc{indiciaead0f5aa001db,
  title = {Teleconferencing: Cost optimization of satellite and ground systems for continuing progressional education and medical services},
  author = {Dunn, D. and Lusignan, B.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19730020368},
  note = {Source identifier: 19730020368}
}