1. Morgan, W. T. J., Naturwiss., 46, 181 (1959).
2. Kabat, E. A., “Blood Group Substances.” (Academic Press, N.Y., 1956).
3. Hackel, E., Smolker, R. E., and Fenske, S. A., Vox Sang., 3, 402 (1958).
4. Mäkelä, O. “Studies in Hemagglutinins of Leguminosae Seeds”. (Helsinki, 1957). Cf. Boyd, W. C., Green, D. M., Fujinaga, D. M., Drabik, J. S., and Waszczenko–Zacharczenko, E., Vox Sang. (in the press).
5. Boyd, W. C., Everhart, D. L., and McMaster, M. H., J. Immunol., 81, 414 (1958).