Joined Cases C-147/97 and C-148/97, Deutsche Post AG v. Gesellschaft für Zahlungssysteme mbH (GZS) and Citicorp Kartenservice GmbH CKG - Common Market Law Review View Joined Cases C-147/97 and C-148/97, Deutsche Post AG v. Gesellschaft für Zahlungssysteme mbH (GZS) and Citicorp Kartenservice GmbH CKG by - Common Market Law Review Joined Cases C-147/97 and C-148/97, Deutsche Post AG v. Gesellschaft für Zahlungssysteme mbH (GZS) and Citicorp Kartenservice GmbH CKG 38 1 Common Market Law Review