(3bGfhf GdELQGAGJ GdLfGFjI (B:s (3WQb GdWYf aj GdCMcGe (B/s - (3YHO GdQMje UObjs ((3GdbGgQI (B:s (3OGQ GdfgVI GdYQHjI ,s, 1989)
. 168 (3HHdjhLQGajG(B: (3UaMI(B.s
(3jTJed Ydi EQLGYGJ HHdjhLQGajIs
Keywords: (3WQb GdWYf aj GdCMcGe GdLfGFjIs; (3bGfhf GdELQGAGJ GdLfGFjIs