(3TYQ GdKhQGJ GdOGNdjI (B: s (3Gdafhf GdTYQjI h GdOQGSI GdafjI (B/ s - (3Lcdj, RjfH HjQgs ((3YeGf (B:s (3OGQ GdVjGA ddfTQ h GdJhRjY,s, 2000)
Keywords: (3GdTYQ GdYQHjs; (3GdYUQ GdYKeGfjs; (3GdfbO GdCOHjs