c - (3gdGdj YHO GddGg CMeOs ((3GdbGgQI (B:s (3OGQ GdfgVI GdYQHjI(B,(3f,s, 2003)
. 310-314 (3HHdjhLQGajG(B: (3UaMGJs
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdJTQjYGJ GdeJYdbI HJbfjI GdeYdheGJs; (3GdbGfhf GdLfGFjs