(3JLQjL GdJhMjO GdeajO (B/ s - (3GdebQjRj, Jbj GdOjf CHh GdYHGSs; (3YHO GdMejO, Ydj MSf Ydjs ((3YeGf (B:s (3OGQ YeGQ,s, 1987)
Keywords: (3GdJhMjOs; (3CUhd GdOjf GdESdGejs