(3eMGhdGJ aj GdJMdjd GdGLJeGYj (B/s - (3fGLj , SajQ s ((3GdLRGFQ (B:s (3OjhGf GdeWHhYGJ GdLGeYjI ,s, 1989)
Keywords: (3GdJMdjd s; (3GdGLJeGYj s; (3eMGhdGJ s