(3COYjI h COGH ddLjd GdeSde (B/ s - (3GdYXe, jhSas ((3HjQhJ (B:s (3OGQ GdEQTGO ddWHGYI h GdfTQ,s, 1972)
Keywords: (3GdESdGes; (3GdhYX h GdEQTGOs