(3GZJfGe GdChbGJ aj GdHGbjGJ GdUGdMGJ bHd gLhe gGOe GddPGJ heTJJ GdTed heaQb GdLeGYGJ (B/s - (3GdSdeGf, YHO GdYRjR Hf eMeO Hf YHO GdQMef,s 1337-1422 (3gLQjG(B.s ([(3O(B. (3e(B. :s (3O(B. (3f(B.](3,s, 1990)
Keywords: (3GdhYX hGdEQTGOs; (3GdOYhI GdESdGejIs; (3GdehJs