1. Ephrussi, B. (1972).Hybridization of Somatic Cells, Princeton University Press, Princeton, New Jersey.
2. Weiss, M.C., and Green, H. (1967).Proc. Natl. Acad. Sci. U.S.A. 58:1104?1111.
3. The Rotterdam Conference (1974). In Bergsma, D. (ed.), Second International Workshop on Human Gene Mapping.Birth Defects: Original Article Series, in press.
4. Scaletta, L.J., Rushforth, N.B., and Ephrussi, B. (1967).Genetics 57:107?124.
5. Koyama, H., Yatabe, I., and Ono, T. (1970).Exp. Cell Res. 62:455?463.