@misc{indiciae9b9b6363043c,
  title = {Discrimination and generalization of complex visual shape variations in pigeons.},
  author = {D P Ferraro and M G Grisham},
  year = {1972},
  doi = {10.2466/pms.1972.35.3.915},
  url = {https://pubmed.ncbi.nlm.nih.gov/4643986/},
  note = {Source identifier: 4643986}
}