RT Journal Article SR Electronic T1 PTERYGIUM JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 300 OP 304 DO 10.1136/bjo.32.5.300 VO 32 IS 5 A1 Rosen, Emanuel YR 1948 UL http://bjo.bmj.com/content/32/5/300.abstract AB