(3CgOGa cd ShQg h ebGUOgG aj GdbQBf GdcQje (B/ s - (3TMGJg, YHO Gddg eMehOs ((3GdbGgQg (B:s (3GdgjFg GdeUQjg GdYGeg ddcJGH,s, 1986)
Keywords: (3GdbQBf GdcQje(B.s; (3JaSjQ GdbQBf(B.s