Não informado. (1933). Population. International Union for the Scientific Investigation of Population.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Population. London: International Union for the Scientific Investigation of Population, 1933.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Population. International Union for the Scientific Investigation of Population, 1933.
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