RT Journal Article SR Electronic T1 FEATURES OF A CLINICALLY NORMAL OPTIC DISC JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 50 OP 52 DO 10.1136/bjo.47.1.50 VO 47 IS 1 A1 Ford, M. A1 Sarwar, M. YR 1963 UL http://bjo.bmj.com/content/47/1/50.abstract AB