The OPARA service was recently upgraded to a new technical platform. You are visiting the outdated OPARA website. Please use https://opara.zih.tu-dresden.de/ for new data submissions. Previously stored data will be migrated in near future and then the old version of OPARA will finally be shut down. Existing DOIs for data publications remain valid.

Grundschuldidaktik Sachunterricht unter besonderer Berücksichtigung der Sozialwissenschaften (GSD SU/Sozialwiss.)

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