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DataCite Metadata Store (German National Library of Science and Technology)
8
Digital Library of University of Wroclaw
1
Directory of Open Access Journals: DOAJ Articles
1
JECES - Journal of East Central European Studies (Herder-Institut)
1
Kujawsko-Pomorska Digital Library (Nicolaus Copernicus University Torun) / Kujawsko-Pomorska Biblioteka Cyfrowa
1
Open-Access-Publikationsserver der Humboldt-Universität: edoc-Server
1
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