TY  - RPRT
TI  - Illumination box for colour vision tests.
AU  - L Frisén
AU  - A Hedin
PY  - 1972
DO  - 10.1111/j.1755-3768.1972.tb05978.x
UR  - https://pubmed.ncbi.nlm.nih.gov/4678269/
ID  - 4678269
ER  -