(3UjO GdNGWQ (B/s - (3GHf GdLhRj, YHO GdQMef Hf Ydj Hf eMeO,s 508-597 (3g`(B.s; (3GdHQ, YHO GdQMef YHO GdMejO CMeOs ((3GdefUhQI, eUQ (B:s (3OGQ Gdjbjf ;s (3GdQjGV (B:s (3OGQ GdbHdJjf,s, 1998)
Keywords: (3GdhYX hGdEQTGOs; (3GdOYhI GdESdGejIs