RT Journal Article SR Electronic T1 MONGOLISM (DOWN'S SYNDROME) AND KERATOCONUS JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 321 OP 330 DO 10.1136/bjo.47.6.321 VO 47 IS 6 A1 J. F. Cullen A1 H. G. Butler YR 1963 UL http://bjo.bmj.com/content/47/6/321.abstract AB