(3GdaQhSjI (B/ s - (3EHf bje GdLhRjI, TeS GdOjf CHh YHO Gddgs ((3WfWG (B:s (3OGQ GdUMGHg ddJQGK,s, 1991)
Keywords: (3GdNjhds; (3GdaQhSjIs