@misc{indiciae9248069be33c,
  title = {A touch-detecting teaching machine with auditory reinforcement.},
  author = {A Cleary and D Packham},
  year = {1968},
  doi = {10.1901/jaba.1968.1-341},
  url = {https://pubmed.ncbi.nlm.nih.gov/16795194/},
  note = {Source identifier: 16795194}
}