(3TQM bGfhf GdCMcGe GdYScQjIs (3GdcJGH GdKGfj ,s (3bGfhf GdELQGAGJ (B/s - (3YRJ eUWai GdOShbjs ((3GdbGgQI (B:s (3ecJHI GdfgVI GdeUQjI ,s, 1991)
. 200-193 (3HHdjhLQGajG(B: (3UaMGJ(B.s
(3jTJed Ydi EQLGYGJ HHdjhLQGajIs
Keywords: (3GdbVGA GdYScQis; (3bGfhf GdELQGAGJ GdLfGFjIs