1. Gold, J. M., Freedman, S. O., and Gold, P., Nature new Biol., 239, 60–62 (1972).
2. MacSween, J. M., Int. J. Cancer, 15, 246–252 (1975).
3. Holburn, A. M., Mach, J.-P., MacDonald, D., and Newlands, M., Immunology, 26, 831–843 (1974).
4. Gold, J. M., Banjo, C., Freedman, S. O., and Gold, P., J. Immun., 111, 1872–1879 (1973).
5. Hunter, W. M., Br. med. Bull., 30, 18–23 (1974).