(3XGgQI ZhQHGJTha (B/ s - (3ebGQ, Tajbs ((3dfOf (B:s (3QjGV GdQjS ddcJGH h GdfTQ,s, 1990)
Keywords: (3JGQjN QhSjGs; (3QhSjGs; (3GdTjhYjIs