(3GdehUd aj GdYgO GdYKeGfj (B:s (3aJQI GdMce GdeMdj (B1139-1249(3g ,(B1726-1834(3e(B/s - (3Qhha ,YeGO YHO GdSdGes ((3GdfLa GdGTQa (B:s (3eWHYI GdGOH ,s, 1975)
Keywords: (3GdehUd (B-(3JGQjN s