@misc{indiciae61cfce11bf52,
  title = {Conditioned vocalization in the budgerigar.},
  author = {N GINSBURG},
  year = {1960},
  doi = {10.1037/h0048391},
  url = {https://pubmed.ncbi.nlm.nih.gov/13850243/},
  note = {Source identifier: 13850243}
}