UN- ESCWA. (1999). survey of Economic and Social Developments in the ESCWA Region 1998-1999. ُ ESCWA.
Tohutoru Kātū Chicago (17th ed.)UN- ESCWA. Survey of Economic and Social Developments in the ESCWA Region 1998-1999. بيروت: ُ ESCWA, 1999.
Tohutoro MLA (9th ed.)UN- ESCWA. Survey of Economic and Social Developments in the ESCWA Region 1998-1999. ُ ESCWA, 1999.
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