TY  - RPRT
TI  - Colour sensitivity in old age.
AU  - L M Dalderup
AU  - M L Friedrichs
PY  - 1969
DO  - 10.1111/j.1532-5415.1969.tb05356.x
UR  - https://pubmed.ncbi.nlm.nih.gov/5774869/
ID  - 5774869
ER  -