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• Aquatic Commons (437)
• ArchiMeD - Elektronische Publikationen der Universität Mainz - Alemanha (2)
• Archive of European Integration (1)
• Archivo Digital para la Docencia y la Investigación - Repositorio Institucional de la Universidad del País Vasco (5)
• Biblioteca Digital da Câmara dos Deputados (4)
• Biblioteca Digital de la Universidad Católica Argentina (2)
• Biodiversity Heritage Library, United States (18)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (13)
• CaltechTHESIS (1)
• Cambridge University Engineering Department Publications Database (1)
• Center for Jewish History Digital Collections (30)
• Chinese Academy of Sciences Institutional Repositories Grid Portal (1)
• Digital Peer Publishing (3)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (118)
• Dokumentenserver der Akademie der Wissenschaften zu Göttingen (1)
• eResearch Archive - Queensland Department of Agriculture; Fisheries and Forestry (1)
• Fachlicher Dokumentenserver Paedagogik/Erziehungswissenschaften (2)
• Gallica, Bibliotheque Numerique - Bibliothèque nationale de France (French National Library) (BnF), France (4)
• Harvard University (2)
• Helda - Digital Repository of University of Helsinki (20)
• Indian Institute of Science - Bangalore - Índia (8)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (1)
• Queensland University of Technology - ePrints Archive (16)
• Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (1)
• Universidad del Rosario, Colombia (1)
• Université de Montréal (1)
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• University of Michigan (301)
• USA Library of Congress (1)