Amin, Mohammad Does temporary migration have to be permanent? / Mohammad Amin & Aaditya Mattoo - Washington, D.C. : The World Bank (WB) , 2005 - 51p. : ill. ; 25 cm. - Policy Research Working Paper No. 3582 . Subjects--Topical Terms: Migration policyLabour mobilityMigration Gov. Doc. Class. No.: UN WB PRWP-3582