(3GMOGK GdbQf GdGaQjbj hMbjbI GdUQGY GdGQJQj (B- (3GdGKjhHj (B.s - (3ZhKGfj , GSYO s ((3HZOGO (B:s (3OGQ GdMQjI ddWHGYI ,s, 1980)
Keywords: (3GdefGRYGJ GdOhdjI (B.s