1. Good, R. A., Gabrielsen, A. E., Peterson, R. D. A., and Cooper, M. D., Trans. and Studies of the College of Physicians of Philadelphia, 33, 180 (1966).
2. Cooper, M. D., Gabrielsen, A. E., and Good, R. A., Ann. Rev. Med., 18, 113 (1967).
3. Cooper, M. D., Perey, D. Y., McKneally, M. F., Gabrielsen, A. E., Sutherland, D. E., and Good, R. A., Lancet, i, 1388 (1966).
4. Cooper, M. D., Peterson, R. D., South, M. A., and Good, R. A., J. Exp. Med., 123, 75 (1966).
5. Humphrey, J. H., Parrott, D. M. V., and East, J., Immunol., 1, 419 (1964).