@misc{indiciaec7acecf049bb,
  title = {Dispensing liquid reinforcers.},
  author = {C Surber and P L Martin},
  year = {1972},
  doi = {10.1901/jaba.1972.5-138},
  url = {https://pubmed.ncbi.nlm.nih.gov/16795332/},
  note = {Source identifier: 16795332}
}