Prester, Hans-Georg 2001: Consumer Panel Research of GFK. In: Papastefanou, Georg/Schmift, Peter/Lüdtke, Helmut/Börsch-Supan, Axel/Oltersdorf, Ulrich (Hg): Social research with consumer Panel-Data. ZUMA-Nachrichten Spezial. Band 7. Mannheim: ZUMA. Seite 13-25.
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Prester, H. G. (2001). Consumer Panel Research of GFK. Band 7. Mannheim: ZUMA. Social research with consumer Panel-Data. ZUMA-Nachrichten Spezial, pp. 13-25.
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