United Nations. Department of Social Affairs. (1949). Problems of migration statistics. United Nations, Department of Social Affairs.
Chicago-viite (17. p.)United Nations. Department of Social Affairs. Problems of Migration Statistics. Lake Success, N.Y: United Nations, Department of Social Affairs, 1949.
MLA-viite (9. p.)United Nations. Department of Social Affairs. Problems of Migration Statistics. United Nations, Department of Social Affairs, 1949.
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