@misc{indiciae02218f77ae08,
  title = {Learning environment.},
  author = {J R Gentile},
  year = {1969},
  doi = {10.1126/science.163.3862.18},
  url = {https://pubmed.ncbi.nlm.nih.gov/5763490/},
  note = {Source identifier: 5763490}
}