1. Land Steiner, K., Specificity of serological reactions. Revised Edition. Cambridge, Mass.: Harvard Univ. Press. 1945.
2. Marrack, J. R. Medical Research Council, special Ren. Series. No. 230, (London 1938 ).
3. Landsteiner and van der Scheer, J. exper. Med. 71, 445 (1940).
4. Avery, Heidelberger and Goebel, J. exper. Med. 42, 709 (1925).
5. Cannon, P. R. and Marshall, F. C., J. Immunol. 38, 365 (1940).