(3GdYedjI GdGHOGYjI ai af GdJUhjQ (B((3YGde GdeYQaI (B109) / s - (3TGcQ YHOGdMejOs ([S.N] : (3GdeLdS GdhWfi ddKbGaI hGdafhf hGdGOGH , s, 1987)
Keywords: (3GdLhGfH GdGLJeGYjIs; (3GdGHOGY GdGOHi hGdafis; (3GdWQb GdafjIs; (3GdJUhjQs; (3GdUhQs; (3GMcGe GdJUhjQs