(3LQGFe GdMGSH GdEdcJQhfj aj GdJTQjY GdebGQf (B/s - (3gOj MGeO bTbhTs ((3GdbGgQI (B:s ,(3OGQ GdfgVI GdYQHjIs, 1992)
. 240-220 (3HHdjhLQGajG(B: (3UaMGJ(B.s
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdJTQjYGJ GdeJYdbI HJbfjI GdeYdheGJs; (3LQGFe GdMGSH GdEdcJQhfjs; (3GdbGfhf GdLfGFj s