RT Journal Article SR Electronic T1 A CLASSIFICATION OF CASES OF CONCOMITANT STRABISMUS BASED ON THE AETIOLOGICAL FACTOR JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 446 OP 451 DO 10.1136/bjo.18.8.446 VO 18 IS 8 A1 Pugh, M. A. YR 1934 UL http://bjo.bmj.com/content/18/8/446.abstract AB