United Nations. Department of Economic and Social Affairs. (1970). Methods of measuring internal migration. United Nations.
Παραπομπή σε μορφή Chicago (17η εκδ.)United Nations. Department of Economic and Social Affairs. Methods of Measuring Internal Migration. New York: United Nations, 1970.
Παραπομπή σε μορφή MLA (9th εκδ.)United Nations. Department of Economic and Social Affairs. Methods of Measuring Internal Migration. United Nations, 1970.
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