1. Birell, J.F. (1960). Diseases of Children 1st Ed., P. 212.Cossel, London.
2. Chhangani, D.L., Goyal, O.D. (1976). Bacteriogical study of chronic suppurative otitis media.Indian J. Otolaryng.
28, 24.
3. Clarke, T.A. (1962). Deafness in children.Proc. Roy. Soc. Med.
55, 61.
4. Cruickshank, R. (1965). Medical Microbiology. Eleventh Ed.Livingston, Edinburgh, London, New York.
5. Friedman, I. (1952). Bacteriological study of otitis.J. Otolaryng.
66, 175.