(3JgPjH cJGH GdESJYGPg (B/ s - (3GdfSGFj, CHh YHO GdQMefs; (3YHO GdMejO, MSfs ((3GdbGgQg (B:s (3OGQ GdMOjK,s, 1989)
Keywords: (3GdESdGes; (3GdMOjK GdTQjas