(3OQGSGJ aj GdUMGaI GdQjGVjI (B:s (3JZWjI GdeHGQjGJ GdQjGVjI UMajG hEPGYjG h JdaRjhfjG JMQjQ GdCNHGQ (B/s - (3NVhQ,COjH s ((3OeTb (B:s (3COjH NVhQ ,s, 1990)
Keywords: (3GdQjGVjI s; (3GdUMGaIs; (3OQGSGJ s