RT Journal Article SR Electronic T1 Epidemiology of strabismus. JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 224 OP 231 DO 10.1136/bjo.58.3.224 VO 58 IS 3 A1 Graham, P A YR 1974 UL http://bjo.bmj.com/content/58/3/224.abstract AB