(3GdbGfhf GdOhdj GdYGe (B:s (3aj GdSde h GdMQH (B/s - (3GdTGaYj eMeO HTjQ(B.s ((3GdefUhQI (B:s (3ecJHI GdLdGA GdLOjOI(B,s, 1998)
. 240-220 (3HHdjhLQGajG(B: (3UaMGJ(B.s
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Keywords: (3GdbGfhf GdOhdj GdYGes