@misc{indiciaecbd839adeb11,
  title = {Matching-to-sample accuracy on fixed-ratio schedules.},
  author = {J R Thomas},
  year = {1979},
  doi = {10.1901/jeab.1979.32-183},
  url = {https://pubmed.ncbi.nlm.nih.gov/501271/},
  note = {Source identifier: 501271}
}