(3GdMVGQI GdYQHjI h GdJCKjQ GdChQhHj aj GaQjbjG GdZQHjI LfhH GdUMQGA (B:s (3OQGSGJ h fUhU (B/s - (3RHGOjI, YHO GdbGOQs ((3GdLRGFQ (B:s (3GdeDSSI GdhWfjI ddcJGH ,s, 1989)
Keywords: (3GaQjbjGGdZQHjIs; (3GdChQhHGs; (3LfhH GdUMQGAs; (3GdMVGQI GdYQHjIs