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%T PISA, PIRLS, and more: the Research Data Centre at the Institute for Educational Progress (FDZ-IQB) %A Knigge, Michel %A Groeneveld, Imke %A Stanat, Petra %A Pant, Hans Anand %J Journal of Contextual Economics : Schmollers Jahrbuch %N 3 %P 521–528 %V 131 %D 2011 %@ 2568-762X %= 2014-01-13T14:08:00Z %~ USB Köln %> https://nbn-resolving.org/urn:nbn:de:0168-ssoar-412436 %C DEU %G en %9 journal article %W GESIS - http://www.gesis.org %~ SSOAR - http://www.ssoar.info