1. Coombs, R. R. A., Mourant, A. E., and Race, R. R., Brit. J. Exp. Path., 26, 255 (1945).
2. Leading article, Lancet, July 16, 1949.
3. Witebsky, E., Blood, special issue No. 2, 66 (1948).
4. Levine, P., and Wigod, M., first meeting of the International Society of Hematology, Buffalo (1948).