(3GdWHjYI GdNGUI ddVHW GdEOGQj hGdBKGQ GdbGfhfjI GdeJQJHI YdjgG (B:s (3OQGSI aj GdbGfhfjf GdeUQj hGdaQfSj (B/s - (3eMeO eMeO HOQGfs ((3GdbGgQI (B:s (3OGQ GdfgVI GdYQHjI(B,s, 1989)
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdVHW GdEOGQjs; (3CgOGa GdGUHW GdEOGQjs; (3CfhGY GdVHW GdEOGQjs