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Statistique et démographie : résolution 174 (VIII) adoptée par la commission à sa 139ème séance plénière le 24 février 1967 

Nations Unies. Commission économique pour l'Afrique; Nations Unies. Conseil Economique et Social (1967-03)
Dans une population en accroissement, l'intervalle qui sépare deux générations successives est compris entre 26 ot 28 ans, disons 27 ans. L'âge de 27 ans pout aussi être considéré comme l'âge moyen de fixation.
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Statistics and demography: resolution 174(VIII) adopted by the commission at its 139th plenary meeting on 24 February 1967 

United Nations. Economic and Social Council; United Nations. Economic Commission for Africa (1967-03)
This paper talking about considering the importance of statistical and demographic studies in planning social and economic development.

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DEMOGRAFIA (2)
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1967 (2)
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