1. Stehbens, W. E., Amer. J. Path., 43, 969 (1963).
2. Boyd, G. S., and Oliver, M. F., in Cholesterol, edit. by Cook, E. P., 181 (Academic Press, New York, 1958).
3. Stehbens, W. E., Amer. J. Path., 36, 289 (1960).
4. Pearse, A. G. E., Histochemistry, second ed., 320 (J. and A. Churchill, Ltd., London, 1960).
5. Wilens, S. L., Amer. J. Path., 27, 825 (1951).