TY  - RPRT
TI  - Is there a single cell code for background light levels?
AU  - D G Ritchie
AU  - A A Lee
AU  - T J Gast
AU  - R M Hill
PY  - 1975
DO  - 10.1007/bf01944612
UR  - https://pubmed.ncbi.nlm.nih.gov/1140283/
ID  - 1140283
ER  -