@misc{indiciaea172b6d964ff,
  title = {Avian oral pigmentation.},
  author = {C O Dummett and G Barens},
  year = {1974},
  doi = {10.1902/jop.1974.45.6.426},
  url = {https://pubmed.ncbi.nlm.nih.gov/4135121/},
  note = {Source identifier: 4135121}
}