(3GdWHbGJ GdUZQi (B/s - (3GHj GdehGgH YHO GdhgGH Hf GMeO Hf Ydj s 973(3g s ((3HjQhJ (B:s (3OGQ GdcJH GdYdejI ,s, 1999)
Keywords: (3JQGLe hTNUjGJ s