(3LQGFe GdCehGd GdYGeI (B:s (3abgG h bVGA (B/s - (3eUWai QVhGfs; (3eMeO YHO GdSdGes ((3GdbGgQI (B:s (3eWHYI GdfgVI GdYQHjI ,s, 1968)
(3GdfU HGddZI GdYQHjIs
Keywords: (3ENJdGS GdeGd GdYGe hGdYOhGf Ydjg hGdZOQs; (3GdbGfhf GdLfGFjs