1. Bentley, F. J., Crysbowski, S. and Benjamin, B. (1954), Tuberculosis in Childhood and Adolescence with Special Reference to the Pulmonary Forms of the Disease.N.A.P.T. London, p. 129.
2. Bhagat, M. P.et al. (1959) cited by Ramachandran and Purnayyan (1966).
3. Bhargava, S. K., Saha, M. M., Agarwal, K. N. and Rao V. (1967). Some observations on the patterns of pulmonary tuberculosis in children.Indian Pediat. 4, 262.
4. Briggs, B., Illingworth, R. S. and Lorber, J. (155). Human source of tuberculosis in children.Lancet,1, 263.
5. Modern Practice in Tuberculosis;H. Cairns,1952