RT Journal Article SR Electronic T1 CRATER-LIKE HOLES IN THE OPTIC DISC JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 465 OP 478 DO 10.1136/bjo.32.8.465 VO 32 IS 8 A1 Emanuel Rosen YR 1948 UL http://bjo.bmj.com/content/32/8/465.abstract AB