1. B.RYANT, 1. (1935).-Trans. Roy. Soc. Trop. Med. and Hyg., Vol. XXVIII, pp. 5, 523.
2. DANIELS, C. W. (1918).-Brit. Ji. OJhthal., Vol. II, p. 83. 1918.
3. Congenital syphilis;D.E.N.N.I.E.; P.A.L.U.L.A.,1941
4. Text-book of Ophthalmology. Vol;DODDS, G.E.;-West Afr. Med. JI., Vol. II,1942
5. DODDS, G. E. (1936).-Trans. Roy. Soc. Trop. Med. end Hyg., Vol. XXX, p. 251.