1. Amano, M., B. Messier, andC. P. Leblond: Specificity of labelled thymidine as a desoxyribonucleic acid precursor in radioautography. J. Histoohem.7, 153 (1958).
2. Barker, D. J. P., andJ. N. Crossley: Effect of testosterone on estrogen induced bone formation in mice. Nature (Lond.)194, 1088 (1962).
3. Bloom, W., M. A. Bloom, andF. C. McLean: Calcification and ossification. Medullary bone changes in the reproductive cycle of female pigeons. Anat. Rec.81, 443 (1941).
4. Bourne, G. H.: The biochemistry and physiology of bone. New York: Academic Press Inc. 1956.
5. Caldwell, R. A.: The effect of sex hormones in experimental osteoporosis in rats. Brit. J. exp. Path.43, 103 (1962).