(3GdbGfhf Qbe (B137 (3dSfI (B1981 (3HEUOGQ bGfhf GdYed habkG dBNQ GdJYOjdGJ (B:s (3eJVefkG ePcQGJI GdEjVGMjI hGdbQGQGJ GdJfajPjI dCMcGeI(B/s - (3eUQ(B.s ((3GdbGgQI (B:s (3GdgjFI GdYGeI dTFhf GdeWGHY GdCejQjI,s, 1999)
Keywords: (3JTQjYGJ hbhGfjfs; (3GdYed(B.s