(3eY GdbQBf GdcQje (B:s (3QDjI eSJfjQI hYUQjI dMbGFb (B.s (3GdYOO GdSGHY (B/s - (3YHOGdaJGM YSGcQs ((3GdbGgQI (B:s (3GdeQcR GdKbGai GdebGhdhf GdYQH,s, 1979)
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdKbGaI GdESdGejIs