1. Gershon, R. K. Transpl. Rev. 26, 170–185 (1975).
2. Tada, T., Taniguchi, M. & Takemori, T. Transpl. Rev. 26, 106–129 (1975).
3. R. W. Dresser (ed.) Immunological Tolerance, Br. med. Bull. 32, 99–191 (1976).
4. Kilshaw, P. J., Brent, L. & Pinto, M. Nature 255, 489–491 (1975).
5. Kilshaw, P. J. & Brent, L. Transpl. Proc. 9, 717–719 (1977).