@misc{indiciae15eba87433ac,
  title = {Colour sensitivity in old age.},
  author = {L M Dalderup and M L Friedrichs},
  year = {1969},
  doi = {10.1111/j.1532-5415.1969.tb05356.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/5774869/},
  note = {Source identifier: 5774869}
}