(3OQGSI aj GdJfejI GdSjGSjI (B/s - (3ZGfe,YHO GdeWdH s ((3GdbGgQI (B:s (3ecJHI fgVI GdTQb ,s, 1981)
Keywords: (3GdJfejIs; (3GdSjGSjIs; (3OQGSI s