@misc{indiciae25e449d08e9b,
  title = {A versatile programmer for ratio and interval schedules using a punched-tape reader.},
  author = {M E Swinnen and W Hodos},
  year = {1967},
  doi = {10.1901/jeab.1967.10-515},
  url = {https://pubmed.ncbi.nlm.nih.gov/6080828/},
  note = {Source identifier: 6080828}
}