%0 Journal Article %A W. S. Duke-Elder %T KERATITIS SICCA %D 1930 %R 10.1136/bjo.14.2.61 %J British Journal of Ophthalmology %P 61-65 %V 14 %N 2 %U https://bjo.bmj.com/content/bjophthalmol/14/2/61.full.pdf