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• KUPS-Datenbank - Universität zu Köln - Kölner UniversitätsPublikationsServer (5)
• Adam Mickiewicz University Repository (2)
• AMS Tesi di Laurea - Alm@DL - Università di Bologna (1)
• Aquatic Commons (55)
• ArchiMeD - Elektronische Publikationen der Universität Mainz - Alemanha (89)
• Archive of European Integration (19)
• Archivo Digital para la Docencia y la Investigación - Repositorio Institucional de la Universidad del País Vasco (3)
• Aston University Research Archive (3)
• Biblioteca Digital | Sistema Integrado de Documentación | UNCuyo - UNCUYO. UNIVERSIDAD NACIONAL DE CUYO. (1)
• Biblioteca Digital de Teses e Dissertações Eletrônicas da UERJ (1)
• Biodiversity Heritage Library, United States (1)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (249)
• Cambridge University Engineering Department Publications Database (1)
• CentAUR: Central Archive University of Reading - UK (2)
• Dalarna University College Electronic Archive (2)
• Digital Peer Publishing (25)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (179)
• Dokumentenserver der Akademie der Wissenschaften zu Göttingen (1)
• Düsseldorfer Dokumenten- und Publikationsservice (6)
• Fachlicher Dokumentenserver Paedagogik/Erziehungswissenschaften (16)
• Greenwich Academic Literature Archive - UK (1)
• Helda - Digital Repository of University of Helsinki (1)
• Institutional Repository of Leibniz University Hannover (2)
• Martin Luther Universitat Halle Wittenberg, Germany (9)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (4)
• Queensland University of Technology - ePrints Archive (2)
• Repositório Institucional da Universidade de Aveiro - Portugal (2)
• SerWisS - Server für Wissenschaftliche Schriften der Fachhochschule Hannover (15)
• Universidad Autónoma de Nuevo León, Mexico (1)
• Universidad Politécnica de Madrid (1)
• Universidade Complutense de Madrid (1)
• Universidade Técnica de Lisboa (1)
• Universitätsbibliothek Kassel, Universität Kassel, Germany (47)
• Université de Lausanne, Switzerland (2)
• University of Innsbruck Digital Library - Austria (1)
• University of Michigan (229)