@misc{indiciaebf0a61b72ec8,
  title = {Notes on four tritanopes.},
  author = {G L Walls},
  year = {1964},
  doi = {10.1016/0042-6989(64)90026-4},
  url = {https://pubmed.ncbi.nlm.nih.gov/5300039/},
  note = {Source identifier: 5300039}
}