The WEMF AG für Werbemedienforschung collects figures on what in Switzerland?
WEMF AG für Werbemedienforschung The WEMF AG für Werbemedienforschung collects figures on media usage in Switzerland and Liechtenstein.
Canton of Solothurn The canton of Solothurn (German:    ) is a canton of Switzerland. It is located in the northwest of Switzerland. The capital is Solothurn.