1. George, J. C., and Scaria, K. S., J. Anim. Morph. Physiol., 3, 91 (1956).
2. Gomori, G., “Microscopic Histochemistry, Principles and Practice” (Univ. Chicago Press, Chicago, 1953).
3. Sneath, P. H. A., cited by Pearse .
4. Pearse, A. G., “Histochemistry, Theoretical and Applied” (J. and A. Churchill, London, 1954).
5. George, J. C., and Naik, R. M., J. Anim. Morph. Physiol., 4, 23 (1957).