TY  - RPRT
TI  - Letter contrast sensitivity function of the eye.
AU  - H L Liou
AU  - N A Brennan
PY  - 1998
DO  - 10.1034/j.1600-0420.1998.760314.x
UR  - https://pubmed.ncbi.nlm.nih.gov/9686846/
ID  - 9686846
ER  -