(3JWhQ GdTYQ GdbUUj (B: s (3aj hUa GdChGHO ef GdYUQ GdLGgdj Edi GdYUQ GdCehj (B/ s - (3GdfLGQ, CMeO eMeOs ((3GdbGgQI (B:s (3GdOGQ GdafjI ddfTQ,s, 1990)
Keywords: (3GdTYQ GdbUUjs; (3GdTYQ GdYQHjs; (3GdYUQ GdLGgdjs