@misc{indiciae56728c974170,
  title = {Stimulus differences in discrimination learning.},
  author = {R A CHAMPION and C D STANDISH},
  year = {1960},
  doi = {10.1037/h0046895},
  url = {https://pubmed.ncbi.nlm.nih.gov/13809090/},
  note = {Source identifier: 13809090}
}