RT Journal Article SR Electronic T1 CATARACTA BRUNESCENS—STUDY OF THE NATURE OF THE COLOURING SUBSTANCE JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 531 OP 540 DO 10.1136/bjo.20.9.531 VO 20 IS 9 A1 Puşcariu, Elena A1 Nitzulescu, Julius YR 1936 UL http://bjo.bmj.com/content/20/9/531.abstract AB