RT Journal Article SR Electronic T1 COLOUR ATLAS OF OPHTHALMOLOGY JF The Journal of the Royal College of General Practitioners JO J R Coll Gen Pract FD British Journal of General Practice SP 625 OP 626 VO 29 IS 207 A1 E. K. Koh YR 1979 UL http://bjgp.org/content/29/207/625.4.abstract AB