(3eGgjI GdehGO h GdfaGjGJ GdNWQI aj GdbGfhf GdeUQj(B:s (3OQGSI ebGQfI (B/ s - (3NGdO GdSjO eJhdj eMeOs ((3GdbGgQI(B:s (3OGQ GdfgVI GdYQHjI,s, 2008)
. 179-169(3HHdjhLQGajG(B: (3UaMGJ(B.s
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdefGWb GdeGFjIs; (3GdbGfhf GdOhdj GdYGes