(3GdeYLe GdeUhQ ddejcQhGdcJQhfjGJ hGdejcQhceHjhJQ (B((3bGehS GfLdjRi(B\ (3YQHi(B) / s - (3ghdGfO, Q(B.(3Ss ([S.N] : (3eDSSI GdGHMGK GddZhjI , s, 1987)
Keywords: (3GdMGSHGJ GdGdcJQhfjIs; (3GdeYGLes; (3GfLdjRi (B\ (3YQHis; (3GdeQGLY GdeJNUUIs