(3GdeJMa GdLhdhLi(B(20 (3ObjbI(B) / s - (3GjgGH GdNTGHs ([S.N] : (3GdeQcR Gdbhei ddSjfeG , s, 1983)
Keywords: (3TQGFW ajOjhs; (3GadGe JSLjdjIs