1. For insight into the early history of embryology and genetics two books written in the 1930s by outstanding scientists cannot be bettered: T. H. Morgan Embryology and Genetics (Columbia University Press New York 1934) and J. Needham A History of Genetics (Cambridge University Press Cambridge 1934).
2. Weismann A., The Germ-Plasm Theory of Heredity (Charles Scribner's Sons, New York, 1902).
3. Driesch H., Anat. Anz.8, 348 (1893).
4. Embryonic Development and Induction
5. For an on-the-spot account of one group's activities in this field as well as a more general overview M. Di Berardino's Genomic Potential of Differentiated Cells (Columbia University Press New York 1997) is recommended.