(3GdLhGfH GdOSJhQjI HMbhb GdEfSGf (B/s - (3eMj Thbj CMeO s ((3GdbGgQI (B:s (3OGQ GdacQ GdYQHj (B,s, 1989)
. 543-505 (3HHdjhLQGajG(B: (3UaMGJ(B.s
(3GdfU CZdHg HGddZI GdYQHjI HYV GdfUhU GdEfLdjRjI hGdaQfSjIs
Keywords: (3GdbGfhf GdOSJhQjs