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• KUPS-Datenbank - Universität zu Köln - Kölner UniversitätsPublikationsServer (2)
• Adam Mickiewicz University Repository (2)
• AMS Tesi di Laurea - Alm@DL - Università di Bologna (1)
• Aquatic Commons (3)
• ArchiMeD - Elektronische Publikationen der Universität Mainz - Alemanha (243)
• Archive of European Integration (4)
• Aston University Research Archive (4)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (128)
• CentAUR: Central Archive University of Reading - UK (1)
• Dalarna University College Electronic Archive (1)
• Digital Peer Publishing (5)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (12)
• Düsseldorfer Dokumenten- und Publikationsservice (2)
• Fachlicher Dokumentenserver Paedagogik/Erziehungswissenschaften (13)
• Institutional Repository of Leibniz University Hannover (1)
• Martin Luther Universitat Halle Wittenberg, Germany (2)
• Portal de Revistas Científicas Complutenses - Espanha (4)
• Publishing Network for Geoscientific & Environmental Data (104)
• Queensland University of Technology - ePrints Archive (1)
• Repositório Institucional da Universidade de Aveiro - Portugal (1)
• Universidade Federal do Pará (1)
• Universitätsbibliothek Kassel, Universität Kassel, Germany (67)
• University of Innsbruck Digital Library - Austria (1)
• University of Michigan (5)