1. AINSLIE, D. (1959). Trans. ophthal. Soc. U.K., 79, 209.
2. BIsLEY, G. G. (1964). Ibid., 84, 55.
3. DHANDA, R. P. (1963). Rev. int. Trachome, 40, 413.
4. FARNARIER, G., GUILLOT, P., and BONA, J. (1951). Ibid., 28, 303.
5. Report, Addis Ababa;FEITELBERG, I.,1964