(3gfOSI GdCSGSGJ (B: s (3JUeje h JfajP GdCSGSGJ GdYejbI h GdNGUI (B/ s - (3GdbUHj, GdSjO YHO GdaJGMs ((3GdbGgQI (B:s (3OGQ GdcJH GdYdejI,s, 2000)
Keywords: (3GdgfOSI GdEfTGFjIs; (3GdCSGSGJs