RT Journal Article SR Electronic T1 RECORDING PUPILLOGRAPH OF SIMPLE DESIGN JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 109 OP 109 DO 10.1136/bjo.36.2.109 VO 36 IS 2 A1 van der Tweel, L. H. YR 1952 UL http://bjo.bmj.com/content/36/2/109.1.abstract AB