@misc{indiciae8cdc89868e36,
  title = {Choice between concurrent schedules.},
  author = {R L Menlove and M Moffitt and C P Shimp},
  year = {1973},
  doi = {10.1901/jeab.1973.19-331},
  url = {https://pubmed.ncbi.nlm.nih.gov/16811668/},
  note = {Source identifier: 16811668}
}