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%T Consumer panel research of GfK %A Prester, Hans-Georg %E Papastefanou, Georgios %E Schmidt, Peter %E Börsch-Supan, Axel %E Lüdtke, Hartmut %E Oltersdorf, Ulrich %P 13-25 %V 7 %D 2001 %@ 3-924220-21-2 %~ GESIS %> https://nbn-resolving.org/urn:nbn:de:0168-ssoar-49471-6 %C DEU %C Mannheim %G en %9 Konferenzbeitrag %W GESIS - http://www.gesis.org %~ SSOAR - http://www.ssoar.info