(3HOGFY GdSdc aj WHGFY Gdedc (B:s - (3GHf GdGRQb, dGHj YHOGddgs (3GdeJhaj (B896 (3gs; (3GdefTGQ ,SGej s ((3HZOGO(B:s (3efThQGJ hRGQI GdKbGaI ,s, 1977)
Keywords: (3GdQLGd (B-(3JQGLe s