@misc{indiciae8d0f50172395,
  title = {Double-alternation learning by retardates.},
  author = {D R Brown and A M Schrier},
  year = {1969},
  doi = {10.2466/pms.1969.28.2.451},
  url = {https://pubmed.ncbi.nlm.nih.gov/4979527/},
  note = {Source identifier: 4979527}
}