1. Ranney, H. M., and Gluecksohn-Waelsch, S., Ann. Hum. Genetics, 19, 269 (1955).
2. Gluecksohn-Waelsch, S., Ranney, H. M., and Sisken, B. F., J. Clin. Invest., 36, 753 (1957).
3. Robinson, A. R., Robson, M., Harrison, A. P., and Zuelzer, W. W., J. Lab. Clin. Med., 50, 745 (1957).
4. Jonxis, J. H. P., and Visser, H. K. A., Amer. J. Diseases of Children, 92, 588 (1956).
5. Itano, H. A., Fed. Proc., 16, 748 (1957).