RT Journal Article SR Electronic T1 Epidemiology of Onchocerciasis JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 366 OP 366 DO 10.1136/bjo.61.5.366-c VO 61 IS 5 A1 John Anderson YR 1977 UL http://bjo.bmj.com/content/61/5/366.4.abstract AB