20091231131600.0 Operating revenue and expense statistics Class A and B private gas utilities in Wisconsin 0098-3225 Operating revenue and expense statistics Class A and B private gas utilities in Wisconsin. Operating revenue and expense statistics Class A and B private gas utilities in Wisconsin. 0098-3225 Operating revenue and expense statistics Class A and B private gas utilities in Wisconsin Wisconsin 0098-3225 0098-3225 0098-3225