(3HOY hYGOGJ jLH Cf JRhd ef GdeLJeY GdESdGej (B/s - (3GdMQHGhj, eMeO Hf YhV RGjOs ([(3O(B. (3e(B. :s (3O(B. (3f(B.](3,s, 1990)
Keywords: (3GdHOY aj GdESdGes