1. Kaliss, N., Cancer Res., 18, 992 (1958).
2. Gorer, P. A., and Kaliss, N., Cancer Res., 19, 824 (1959).
3. Snell, G. D., Winn, H. J., Stimpfling, J. H., and Parker, S. J., J. Exp. Med., 112, 293 (1960).
4. Snell, G. D., Cancer Res., 17, 2 (1957).
5. Gorer, P. A., Ciba Found. Symp. Cellular Aspects of Immunity, 330 (1960).