RT Journal Article SR Electronic T1 THE EXTRACTION OF CATARACT JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 300 OP 301 DO 10.1136/bjo.2.5.300-a VO 2 IS 5 A1 Hepburn, Malcolm L. YR 1918 UL http://bjo.bmj.com/content/2/5/300.2.abstract AB