1. Yorke, W., and Adams, A. R. D., Ann. Trop. Med. Parasitol., 20, 279 (1926).
2. Singh, B. N., Saxena, U., and Iyer, S. S., Indian J. Exp. Biol., 3, 110 (1965).
3. Singh, B. N., Mathew, S., and Anand, N., J. Gen. Microbiol., 19, 104 (1958).
4. Kaushiva, B. S., and Singh, B. N., J. Sci. Indust. Res., 14 C, 86 (1955).
5. Dhar, M. L., Perspective in Chemotherapy, Symposium on Chemotherapy, 7 (Council of Scientific and Industrial Research, New Delhi, 1959).