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Excerpt from Éléments de Démographie
La démographie (2) est l'étude des collectivités humaines. Son objet est de savoir de quels éléments elles sont constituées, comment elles vivent et comment elles se renouvellent Son principal instrument d'investigation est la statistique.
Population de la terre et plus spécialement de l' Europe.
Il y a un milliard et demi d'habitants sur la terre. Ils sont ainsi répartis: (4)
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