@misc{indiciaeaa17a0a40973,
  title = {Further comment on classical and instrumental conditioning.},
  author = {M M BERKUN},
  year = {1959},
  doi = {10.1037/h0084007},
  url = {https://pubmed.ncbi.nlm.nih.gov/13799532/},
  note = {Source identifier: 13799532}
}