(3cJGH GdYQT heG Qhi ajg (B/ s - (3EHf CHj TjHg, CHh LYaQ eMeO Hf YKeGfs; (3GdMehO, YHO Gddg eMeO Hf MeOs ((3GdbGgQg (B:s (3GdOGQ GdSdajg dfTQ GdYde,s, 1990)
Keywords: (3GdESdGes; (3CUhd GdOjf GdESdGejs; (3GdJhMjOs