(3bGfhf Qbe (B137 (3dSfI (B1981 :s (3HEUOGQ bGfhf GdYed habG dBNQ JYOjdGJg (B((3eJVefkG ePcQJg GdEjVGMjI hGdbQGQGJ GdJfajPjI dCMcGeI(B) /s - (3eUQ(B.s ((3GdbGgQI (B:s (3GdgjFI GdYGeI dTFhf GdeWGHY GdCejQjI,s, 1994)
Keywords: (3JTQjYGJ hbhGfjfs; (3GdYed hGdYeGd(B.s