(3GdJWhQ GdJTQjYi ai GdeedcI GdYQHjI GdSYhOjI (B/ s - (3eMeO YHOGdLhGO eMeOs ([S.N] : (3ecJHg GdfgVg GdeUQjg , s, 1977)
Keywords: (3GdbGfhfs; (3GdSYhOjIs; (3GdbVGAs; (3bhGfjf hJTQjYGJs