1. Appella, E., Mage, R. G., Dubiski, S., and Reisfeld, R., 1968.Proc. Nat. Acad. Sci. 60:975.
2. Baker, P. J., Stashak, R. W., Amsbaugh, D. F., Prescott, B., and Barth, R. F., 1970. J. Immunol 105: 1581.
3. Brambell, F. W. R., 1970. The Transmission of Passive Immunity from Mother to Young. American-Elsevier, New York. Cebra, J. J., 1968. Symp. Intern. Soe. Cell Biol. 7: 69.
4. Claman, H. N., and Chaperon, E. A., 1969. Transpl. Rev. 1: 92.
5. Cunningham, A. J. and Sercarz, E. E., 1971. Eur. J. Immunol 1: 413.