(3GdTYQ GdMQ aj GdNdjL GdYQHj (B: s (3GdchjJ (B- (3YeGf (B- (3GdHMQjf(B- (3bWQ (B- (3GdEeGQGJ efP fTCJg Edi YGe (B1990 (3OQGSI afjI (B/ s - (3GdHTjQ, UHGM ESjhOs ((3YeGf (B:s (3GdGcGOjejI ddfTQ,s, 1999)
Keywords: (3GdTYQ GdYQHjs; (3GdfbO GdCOHjs; (3Ohd GdNdjL GdYQHjIs