1. Burgen, A. S. V., and Emmelin, N. G., Physiology of the Salivary Glands (Edward Arnold (Publishers), Ltd., London, 1961).
2. Chan, W. C., J. Path. Bact., 88, 563 (1964).
3. Selye, H., Veilleux, R., and Cantin, M., Science, 133, 44 (1961).
4. Siefert, G., Beiträge zur path. Anat., 126, 322 (1962).
5. Schneyer, C., Amer. J. Physiol., 203, 232 (1962).