TY  - RPRT
TI  - Charting and scoring the optic disc.
AU  - G P Halberg
PY  - 1969
DO  - 10.1001/archopht.1969.00990020151001
UR  - https://pubmed.ncbi.nlm.nih.gov/5796088/
ID  - 5796088
ER  -