RT Journal Article SR Electronic T1 THE VISION OF RAILWAYMEN JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 319 OP 321 DO 10.1136/bjo.6.7.319 VO 6 IS 7 A1 Leonard J. C. Mitchell YR 1922 UL http://bjo.bmj.com/content/6/7/319.abstract AB