1. Walford, R. L., The Isoantigenic Systems of Human Leukocytes (Munksgaard, Copenhagen, 1969).
2. Batchelor, J. R., and Chapman, B. A., J. Clin. Path., Suppl., 20, 415 (1967).
3. Kissmeyer-Nielsen, F., Svejgaard, A., and Hauge, M., Nature, 219, 1116 (1968).
4. Dausset, J., Walford, R. L., Colombani, J., Legrand, L., and Feingold, N., Transpl. Proc., 1, 331 (1969).
5. Walford, R. L., Shanbrom, E., Troup, G. M., Zeller, E., and Ackerman, B., Histocompatibility Testing, 221 (Munksgaard, Copenhagen, 1967).