(3GdeSJXQa ef CNHGQ GdLhQGj (B/ s - (3GdSjhWj, LdGd GdOjf CHh GdaVd YHO GdQMefs; (3JeGe, CMeO YHO GdaJGMs ((3GdbGgQI (B:s (3ecJHI GdJQGK,s, 1989)
Keywords: (3GdCOH GdYQHjs; (3GdYUQ GdYHGSjs