(1971). Methods of projecting the economically active population /: Manuals on methods of estimating population. New York: United Nations.
Παραπομπή Chicago StyleMethods of Projecting the Economically Active Population /: Manuals On Methods of Estimating Population. New York: United Nations, 1971.
Παραπομπή MLAMethods of Projecting the Economically Active Population /: Manuals On Methods of Estimating Population. New York: United Nations, 1971.
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