(3GdUMGaI GdYQHjI (B:s (3GdGYdGe GdGNHGQj h YLdI GdSjGSI aj GdYGde GdYQHj (B. /s - (3Qhh,hdje CjI s; (3ehSi(B,(3GdcjdGfj s ((3GdCQOf (B:s (3eQcR GdcJH GdCQOfj ,s, 1989)
Keywords: (3GdSjGSI s; (3GdYGde GdYQHj s; (3GdGYdGe Gs; (3GdUMGaIs