RT Journal Article SR Electronic T1 Atlas of the Ocular Fundus JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 556 OP 556 DO 10.1136/bjo.69.7.556 VO 69 IS 7 A1 Ronald J Marsh YR 1985 UL http://bjo.bmj.com/content/69/7/556.1.abstract AB