@misc{indiciaea0f1cc51c8ee,
  title = {Basic physical systems for communication between two individuals.},
  author = {G E PETERSON},
  year = {1953},
  doi = {10.1044/jshd.1802.116},
  url = {https://pubmed.ncbi.nlm.nih.gov/13062324/},
  note = {Source identifier: 13062324}
}