1. Small prematures at 6-7 years of age. I, Develop- mental state;Takkunen;Ann. Paediat. Fenn.,1963
2. II, School maturity;Frisk;Ibid,1963
3. III, Comparison of prematures born in 1955 and 1956;Frisk;Ibid,1964
4. IV, Follow-up study of 110 children;Kantero;Ibid,1965
5. Late sequelae of prematurity;Wohlmuth;Acta Paediat. Acad. sci. hung.,1965