RT Journal Article SR Electronic T1 Effects on employment of defects in colour vision. JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 753 OP 760 DO 10.1136/bjo.55.11.753 VO 55 IS 11 A1 Taylor, W O YR 1971 UL http://bjo.bmj.com/content/55/11/753.abstract AB