1. Text-book of Ophthalmology;APARISI, T.,1950
2. Kimpton, London. ELLIOTr, D. C. (1948). Int. J. Leprosy, 16, 347..
3. Kimpton, London. ELLIOTr, D. C. (1949). Ibid., 17, 229.
4. v;FRANKE, E.; DELBANCO, E.;Graefes Arch. Ophthal,1900
5. GIBSON, J. B. G. (1950). Med. J. Aust., 1, 8.