(3OQGSGJ aj GdUMGaI GdQjGVjI (B:s (3JZWjI GdeHGQjGJ GdQjGVjI UMajG h EPGYjG h JdaRjhfjG JMQjQ GdCNHGQ GdQjGVjI (B/s - (3eLehYI ef GdjGMKjf GdCeQjcjjf s; (3NVhQ(B,(3COjHs ((3OeTb (B:s (3COjH NVhQ ,s, 1990)
Keywords: (3GdCNHGQ GdQjGVjIs; (3GdUMGaI GdQjGVjIs; (3GdeHGQjGJ GdQjGVjI s; (3UMajGs