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1 Sharmistha Bagchi-sen.St ructural Determinants of Occupational Shifts for Males and f emales in The U.S.Labor Market.Professional Geographer, 1995, 47(3)
2 范力达.人口迁移的均衡模型与非均衡模型评述.中国人口科学, 1994(5)
3 David A.Plane, Peter A.rogerson.How Age Composition Regulates us Migration.Professiona l Geographer, 1991, 43(4)
4 同2
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