1. Chicago Conference: Standardization in Human Cytogenetics. Birth Defects II, 1?20. The National Foundation, New York 1966.
2. Dekaban, A.: Persisting clone of cells with an abnormal chromosome in a woman previously irradiated. J. nucl. Med.6, 740?746 (1965).
3. Emerit, J., de Grouchy, J., Vernant, P.: Deux observations de cassures identiques d'une m�me chromosome du groupe C. Ann. G�n�t.11, 22?27 (1968).
4. Gooch, P. C., Fischer, C. L.: High frequency of a specific chromosome abnormality in leukocytes of a normal female. Cytogenetics8, 1?8 (1969).
5. Moorhead, P. S., Nowell, P. C., Mellman, W. J., Battips, D. M., Hungerford, D. A.: Chromosome preparations of leukocytes cultured from human peripheral blood. Exp. Cell. Res.20, 613?616 (1960).