(3GdHjQjSJQhjcG (B: s (3JacjQ LOjO dHdGOfG h ddYGde (B/ s - (3ZhQHGJTha, ejNGFjds; (3YHO GdLhGO, MeOjs ((3GdbGgQI (B:s (3OGQ GdTQhb,s, 1990)
Keywords: (3JGQjN QhSjGs; (3GdTjhYjIs