1. Race, R. R., and Sanger, R., “Blood Groups in Man”, 51 (1950); 62 (1954); 74 (1958) (Oxford University Press).
2. Ikin, E. W., et al., cited by Mourant, A. E., in “The Distribution of the Human Blood Groups”, 358 (Oxford University Press, 1954).
3. O'Riordan, J., and Cann, J., Vox Sang., (N.S.), 4, 242 (1959).