1. Ascenzi, A.: Structure of bone tissue as studied in electron microscope. Sci. med. ital. 3, 670-709 (1955).
2. Ascenzi, A.: Structure of bone tissue as studied in electron microscope. Sci. med. ital. 3, 670-709 (1955).
3. Atkinson, H. F.: A high speed section cutting machine. Brit. dent. J. 88, 29-31 (1950).
4. Atkinson, H. F.: — Ground sections of enamel. Brit. dent. Ann. 144-149 (1952).
5. Barrand, J., and P. Cartier: Étude radio-cristallographique de la demineralisation de l’os. C. R. Acad. Sci. (Paris) 232, 417-419 (1951).