@misc{indiciae6cad76dd7275,
  title = {Learning in farm animals.},
  author = {D D Kratzer},
  year = {1971},
  doi = {10.2527/jas1971.3261268x},
  url = {https://pubmed.ncbi.nlm.nih.gov/4932230/},
  note = {Source identifier: 4932230}
}