@misc{indiciae5e74741d456c,
  title = {A note on second-order conditioning and secondary reinforcement.},
  author = {G RAZRAN},
  year = {1955},
  doi = {10.1037/h0047135},
  url = {https://pubmed.ncbi.nlm.nih.gov/13254970/},
  note = {Source identifier: 13254970}
}