(3cJGH JdHjS EHdjS (B/s - (3GHf GdLhRj, YHO GdQMef Hf Ydj Hf eMeO,s 508-597 (3g`(B.s; (3GdegOj,YHO GdQRGbs ((3HjQhJ (B:s (3OGQ GdNjQ,s, 1998)
Keywords: (3GdTjGWjf hGdLGfs; (3GdhYX hGdEQTGOs