(3JUeje h EfJGL GdhSGFd GdJYdjejI aj GdJQHjI GdNGUI (B/ s ((3YeGf (B:s (3OGQ GdacQ ddfTQ,s, 1999)
Keywords: (3CSGdjH GdJOQjSs; (3GdJQHjI GdNGUIs; (3GdJNda GdYbdjs; (3GdWdGH GdeYhbhfs