@misc{indiciae3a31de8ea3dd,
  title = {Visual response system.},
  author = {W L Heward},
  year = {1978},
  doi = {10.1177/001440297804400609},
  url = {https://pubmed.ncbi.nlm.nih.gov/75794/},
  note = {Source identifier: 75794}
}