(3LQGFe GdJRhjQ hGdQThI aj CfXeI GdeedcI GdYQHjI GdSYhOjI (B/s - (3YHO GdaJGM NVQs ((3GdQjGV (B:s (3ecJH UdGM GdMLjdGf ddeMGeGI hGdGSJTGQGJ GdbGfhfjI ,s, 1990)
. 346-335(3HHdjhLQGajG(B: (3UaMGJ(B.s
Keywords: (3GdJRhjQs -- (3GdeedcI GdYQHjI GdSYhOjIs; (3GdbGfhf GdLfGFjs