(3OQGSGJ aj GdfXQjI GdgLQI h eTcdGJgG GdELJeGYjI h GdKbGajI (B/ s - (3GdQHGjYI, CMeOs ((3YeGf (B:s (3OGFQI GdKbGaI h Gdafhf,s, 1987)
Keywords: (3GdgLQI h GdegGLQhfs