1. Von Muralt, G., in Hitzig, W. H., Die Plasma-proteine in der Klinischen Medizin, 105 (Springer-Verlag, Berlin, 1963).
2. Gitlin, D., Kumate, J., Urrusti, J., and Morales, C. J., Clin. Invest., 43, 1938 (1964).
3. Mancini, R., Vaerman, J. P., Carbonara, A. O., and Heremans, J. F., Eleventh Colloquium on Prctides of the Biological Fluids, edit. by Peters, H., 370 (Elsevier, Amsterdam, 1964).
4. Fahey, J. L., and McKelvey, E. M., J. Immunol., 94, 84 (1965).
5. Kohler, P. F. (unpublished observations).