(3JQHjI ScGfjI (B/s - (3YHOGdefYe QGVj(B.s; (3C(B. (3LQLS QRb GSYOs; (3C(B.(3O eOjMI GdSYjOs ((3GdbGgQI(B:s (3GdeLdS Gdbhej ddScGf (B.s, 1997)
Keywords: (3GdeGdjI GdYGeI hGdJTQjY GdVQjHj(B.s