TY - JOUR T1 - STUDIES IN DARK ADAPTATION AS A MEANS OF DETECTING DEFICIENCY OF VITAMIN “A” JF - British Journal of Ophthalmology JO - Br J Ophthalmol SP - 556 LP - 568 DO - 10.1136/bjo.28.11.556 VL - 28 IS - 11 AU - G. W. Robertson AU - John Yudkin Y1 - 1944/11/01 UR - http://bjo.bmj.com/content/28/11/556.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -