RT Journal Article SR Electronic T1 Variations in the normal electro-oculogram. JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 44 OP 49 DO 10.1136/bjo.51.1.44 VO 51 IS 1 A1 Kelsey, J. H. YR 1967 UL http://bjo.bmj.com/content/51/1/44.abstract AB