TY - CPAPER T1 - Are Ads on Google Search Engine Results Pages Labeled Clearly Enough? AU - Lewandowski, Dirk AU - Sünkler, Sebastian AU - Kerkmann, Friederike PY - 2017 LA - eng PB - Humboldt-Universität zu Berlin DO - http://dx.doi.org/10.18452/1450 ER -