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• Aquatic Commons (62)
• ArchiMeD - Elektronische Publikationen der Universität Mainz - Alemanha (28)
• Archive of European Integration (1)
• Biodiversity Heritage Library, United States (4)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (294)
• CentAUR: Central Archive University of Reading - UK (7)
• Center for Jewish History Digital Collections (16)
• Dalarna University College Electronic Archive (1)
• DI-fusion - The institutional repository of Université Libre de Bruxelles (1)
• Digital Peer Publishing (21)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (111)
• Dokumentenserver der Akademie der Wissenschaften zu Göttingen (57)
• Fachlicher Dokumentenserver Paedagogik/Erziehungswissenschaften (1)
• Helda - Digital Repository of University of Helsinki (3)
• Portal de Revistas Científicas Complutenses - Espanha (4)
• Publishing Network for Geoscientific & Environmental Data (26)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (9)
• Queensland University of Technology - ePrints Archive (1)
• Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (1)
• SAPIENTIA - Universidade do Algarve - Portugal (1)
• SerWisS - Server für Wissenschaftliche Schriften der Fachhochschule Hannover (7)
• Universitätsbibliothek Kassel, Universität Kassel, Germany (44)
• Université de Lausanne, Switzerland (5)
• University of Michigan (288)
• WestminsterResearch - UK (1)