1. Abt, A. F.: Mononuclear erythrophagocytosis in the blood of a new-born infant. Amer. J. Dis. Child. 42, 1364 (1931).
2. Ackroyd, J. F.: Progress in allergy. Basel: Karger 1952.
3. Adamson, C. A.: A bacteriological study of lymphnodes. Acta med. scand. 133, Suppl. 227 (1949).
4. Aggeler, P. M., S. G. White, M. B. Glendening, E. W. Page, T B Leake and G. Bater: Plasma thromboplastin component (Ptc) deficiency; a new disease resembling hemophilia. Proc. Soc. exp. Biol. (N. Y.) 79, 692 (1952).
5. Allen, E. N., N. W. Barker and E. A. Hines: Peripheral vascular diseases. Philadelphia: W. B. Saunders Company 1947.