1. Moloney, J. B., J. Nat. Cancer Inst., 24, 933 (1960).
2. Kawakami, T. G., Theilen, G. H., Dungworth, D. L., Munn, R. J., and Beall, S. G., Science, 158, 1049 (1967).
3. Kawakami, T. G., McKain, D., and Fielding, H., Fifth Intern. Symp. Compar. Leukemia Res., Padua, Italy, 32 (1971).
4. Theilen, G. H., Rabin, H., Gould, D., Fowler, M. E., Cooper, R. W., and Dungworth, D. L., Fifth Intern. Symp. Compar. Leukemia Res., Padua, Italy, 32 (1971).
5. Theilen, G. H., Gould, D., Fowler, M. E., and Dungworth, D. L., J. Nat. Cancer Inst., 47, 881 (1971).