(3QhjOg h LOGjd (B: s (3TYQ TYHj (B/ s - (3TGcQ, YGgOs ((3YeGf (B:s (3QGHWI GdcJGH GdCQOfjjf,s, 1985)
Keywords: (3GdTYQ GdYQHjs; (3GdTYQ GdfHWjs; (3GdCQOfs