The comparative relevance of cohort aggregation and of increased specificity in the determination of the trend in fertility

von Ryder, N. B.
Veröffentlicht in World Population Conference Proceedings of the World Population Conference, 1954 ; Vol. 4 (1957)

Fertility in developed countries during the twentieh century

von Ryder, N. B.
Veröffentlicht in World Population Conference Proceedings of the World Population Conference ; Vol. 2: Selected papers and summaries. Fertility, family planning, mortality (1967)

The interpretation of origin statistics

von Ryder, N. B.
Veröffentlicht in The Canadian journal of economics and political science (1955)

Le mesure des variations de la fécondité au cours du temps

von Ryder, N. B.
Veröffentlicht in Population <Paris> (1956)