1. Karush, F. (1962), Advan. Immunol., 2, 1.
2. Gill, T. J. III (1970), Immunochemistry, 7, 99.
3. Farr, R. S. and Minden,P. (1968), Ann. NY Acad. Sci., 154, 107.
4. Minden, P., Anthony, B. F. and Farr, R. S. (1968), J. Immunol., 102,832.
5. Heidelberger, M. and Kendall, F. E. (1929), J. Exp. Med., 50, 809.