1. Landsteiner, K., and Raubitschek, H., Zbl Bakt., 45, 660 (1908).
2. Saint-Paul, M., Transfusion, Paris, 4, 3 (1961).
3. Vincent, J. M., IBP Handbook, 15 (1970).
4. Coombs, R. A., Scient. Basis Med. Ann. Rev., 16 (1967).
5. Porter, F. E., Nelson, I. S., and Wold, E. K., Crops Soils, 18, 10 (1966).