TY  - RPRT
TI  - Threshold and suprathreshold perceptual color differences.
AU  - R F Witzel
AU  - R W Burnham
AU  - J W Onley
PY  - 1973
DO  - 10.1364/josa.63.000615
UR  - https://pubmed.ncbi.nlm.nih.gov/4731340/
ID  - 4731340
ER  -