TY  - RPRT
TI  - Age variations in normal human contrast sensitivity.
AU  - G Derefeldt
AU  - G Lennerstrand
AU  - B Lundh
PY  - 1979
DO  - 10.1111/j.1755-3768.1979.tb00517.x
UR  - https://pubmed.ncbi.nlm.nih.gov/525292/
ID  - 525292
ER  -