1. Nachlas, M. M., Prinn, W., and Seligman, A. M., J. Biophys. and Biochem. Cytol., 2, 487 (1956).
2. Barka, T., and Anderson, P. J., Histochemistry, 207 (Harper and Row, Publishers, Inc., 1963).
3. Burstone, M. S., Enzyme Histochemistry, 267, 277 (Academic Press, 1962).
4. Pearse, A. G. E., Histochemistry, 872, 881, 886, 896 (J. and A. Churchill, Ltd., 1960).
5. Barka, T., and Anderson, P. J., Histochemistry, 316 (Harper and Row, Publishers, Inc., 1963).