(3GdQbGHI GdeUQajI (B/s - (3WjGQ , YHO GdcQje s ((3GdLRGFQ (B:s (3OjhGf GdeWHhYGJ GdLGeYjI ,s, 1988)
Keywords: (3GdeUQajI s; (3GdQbGHIs