@misc{indiciae0b2593f513c2,
  title = {TWO-WAY TELEPHONE SYSTEM FOR SEMINARS USING POST-OFFICE TRUNK LINES.},
  author = {M BALINT},
  year = {1964},
  doi = {10.1016/s0140-6736(64)92759-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/14219146/},
  note = {Source identifier: 14219146}
}