(3bUI GdKhQI cGedI s - (3CfhQ GdSGOGJ s ((3eUQ (B:s (3OGQ GdgdGd (B,s, 1957)
. 240-220 (3HHdjhLQGajG(B: (3UaMGJ(B.s
Keywords: (3JGQjN eUQ s; (3KhQGJ eUQjI s