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• Aquatic Commons (14)
• ArchiMeD - Elektronische Publikationen der Universität Mainz - Alemanha (7)
• Archive of European Integration (12)
• Archivo Digital para la Docencia y la Investigación - Repositorio Institucional de la Universidad del País Vasco (1)
• Biodiversity Heritage Library, United States (7)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (103)
• Brock University, Canada (5)
• CamPuce - an association for the promotion of science and humanities in African Countries (1)
• CentAUR: Central Archive University of Reading - UK (1)
• Center for Jewish History Digital Collections (3)
• Digital Peer Publishing (17)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (472)
• Fachlicher Dokumentenserver Paedagogik/Erziehungswissenschaften (2)
• Gallica, Bibliotheque Numerique - Bibliothèque nationale de France (French National Library) (BnF), France (2)
• Harvard University (1)
• Helda - Digital Repository of University of Helsinki (2)
• Ministerio de Cultura, Spain (4)
• Portal de Revistas Científicas Complutenses - Espanha (3)
• Publishing Network for Geoscientific & Environmental Data (22)
• Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (3)
• SerWisS - Server für Wissenschaftliche Schriften der Fachhochschule Hannover (1)
• Universidad del Rosario, Colombia (1)
• Universitätsbibliothek Kassel, Universität Kassel, Germany (10)
• Université de Lausanne, Switzerland (1)
• University of Innsbruck Digital Library - Austria (3)
• University of Michigan (292)