@misc{indiciaec555eedd052b,
  title = {A low-cost, rapid delivery point system with "automatic" recording.},
  author = {R A Aitchison},
  year = {1972},
  doi = {10.1901/jaba.1972.5-527},
  url = {https://pubmed.ncbi.nlm.nih.gov/16795379/},
  note = {Source identifier: 16795379}
}