(3GdLfhf GdTQbi(B: (3QhGjIs ([S.N] : (3ecJHI eOHhdi , s, 1989)
Keywords: (3GdGOH GdYQHis; (3GdbUU GdYQHjIs; (3GdWdGbs; (3GdbUU GdYGWajIs