(3GdNWH GdefHQjI aj GdefGSHGJ GdYUQjI (B/ s - (3Bd ahRGf, UGdM Hf ahRGf Hf YHO Gddgs ((3HjQhJ (B:s (3eDSSI GdQSGdI,s, 2000)
Keywords: (3GdhYX h GdEQTGOs; (3GdNWH GdOjfjIs