Document Type : Research Paper
Authors
1 PhD student in Demography, Department of Social Sciences, Islamic Azad University, Research Sciences Unit. Tehran. Iran
2 Associate Professor Emeritus, Department of Demography, Faculty of Social Sciences, University of Tehran, Tehran. Iran (responsible author).
3 Assistant Professor of Demography, Department of Social Sciences, Islamic Azad University, Garmsar branch. Semnan Iran.
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