TY  - RPRT
TI  - Where is the gray line?
AU  - A E Wulc
AU  - R M Dryden
AU  - T Khatchaturian
PY  - 1987
DO  - 10.1001/archopht.1987.01060080094035
UR  - https://pubmed.ncbi.nlm.nih.gov/3632419/
ID  - 3632419
ER  -