1. Harris, H., Cell Fusion (Harvard University Press, Cambridge, 1970).
2. New Haven Conference: First International Workshop on Human Gene Mapping. Birth Defects: Original Article Series X:3. (The National Foundation, New York, 1974).
3. Bobrow, M., Madan, K., and Pearson, P. L., Nature new Biol., 238, 122–124 (1972).
4. Gagne, A., and Laberge, C., Expl Cell Res., 73, 239–242 (1972).
5. Seabright, M., Lancet, ii, 971–972 (1971).