1. Ruddle, F. H., in Symp. Intern. Soc. for Cell Biology (edit, by Padykula, H. A.), 9, 233 (Academic Press, New York, 1970).
2. Barski, G., Sorieul, S., and Cornefert, F., J. Nat. Cancer Inst., 26 (5), 1269 (1961).
3. Harris, H., and Watkins, J., Nature, 205, 640 (1965).
4. Ruddle, F. H., Fed. Proc., 30, 921 (1971).
5. Weiss, M., and Green, H., Proc. US Nat. Acad. Sci., 58, 1104 (1967).