@misc{indiciaea49f19d3f757,
  title = {Spatial contiguity facilitates Pavlovian second-order conditioning.},
  author = {R A Rescorla and C L Cunningham},
  year = {1979},
  doi = {10.1037//0097-7403.5.2.152},
  url = {https://pubmed.ncbi.nlm.nih.gov/528884/},
  note = {Source identifier: 528884}
}