1. Abelev, G. I., Transplant. Rev., 20, 3–37 (1974).
2. Abelev, G. I., Adv. Cancer Res., 14, 295–358 (1971).
3. Kew, M., Gut, 15, 814–821 (1974).
4. McIntire, K. R., Waldmann, T. A., Moertel, C. G., and Go, V. L. W., Cancer Res. (in the press).
5. Ogra, S. S., Murgita, R., and Tomasi, T. B., Immun. Commun., 3, 497–508 (1974).