@misc{indiciae5da96e71ebec,
  title = {Letter: Retinal spectroscopy.},
  author = {G M Yuill},
  year = {1975},
  doi = {10.1016/s0140-6736(75)92984-0},
  url = {https://pubmed.ncbi.nlm.nih.gov/49633/},
  note = {Source identifier: 49633}
}