1. National Statistical Service of Greece: Social Welfare and Health Statistics, B 16 Public Health, Athens: NSS (1979).
2. Stefanou, T.: Morbidity and mortality caused by diphtheria in the area of Attica during the years 1953–1966. Doctoral thesis, Athens 1971.
3. Trichopoulos, D., Politou, G., Papoutsakis, G., Kyriakidou, A., Vassiliadis, P. Diphtheria carriers among school children in Athens. Scand. J. Infect. Dis. 4 (1972) 197–201.
4. World Health Organization World health statistics annual 1962–1968. Volume II, Infectious diseases: cases, deaths and vaccinations. WHO, Geneva 1965–1971.
5. World Health Organization World health statistics annual. Volume II, Infectious diseases, cases. WHO, Geneva 1979.