1. Allison, A. C. and Blumberg, B. S. (1961), An iso-precipitin reaction distinguishing human serum protein types, Lancet, 634–637.
2. Doll, E. R., Richards, M. G., Wallace, M. E. and Bryans, J. T. (1952), The influence of an equine fetal tissue vaccine on heamagglutination activity of mare serums: its relation to hemolytic icterus of newborn foals, Cornell Vet. 42. 495.
3. Goodwin, R. F. W., Saison, R. and Coombs, R. R. A. (1955), The blood groups of the pig. (II). J. Comp. Path., 65.
4. Goodwin, R. F. W. and Saison, R. (1956), The blood groups of the pig, (III). J. Comp. Path., 66.
5. Goodwin, R. F. W. and Coombs, R. R. A. (1956), The blood groups of the pigs. (IV). J. Ccmp. Path., 66.