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• Aquatic Commons (370)
• ArchiMeD - Elektronische Publikationen der Universität Mainz - Alemanha (4)
• Archivo Digital para la Docencia y la Investigación - Repositorio Institucional de la Universidad del País Vasco (5)
• Biblioteca Digital da Câmara dos Deputados (2)
• Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (2)
• Biblioteca Digital de la Universidad Católica Argentina (2)
• Biodiversity Heritage Library, United States (6)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (112)
• CaltechTHESIS (1)
• Cambridge University Engineering Department Publications Database (1)
• Center for Jewish History Digital Collections (31)
• Chinese Academy of Sciences Institutional Repositories Grid Portal (1)
• CORA - Cork Open Research Archive - University College Cork - Ireland (1)
• Digital Peer Publishing (6)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (141)
• eResearch Archive - Queensland Department of Agriculture; Fisheries and Forestry (1)
• Fachlicher Dokumentenserver Paedagogik/Erziehungswissenschaften (6)
• Gallica, Bibliotheque Numerique - Bibliothèque nationale de France (French National Library) (BnF), France (3)
• Harvard University (2)
• Helda - Digital Repository of University of Helsinki (19)
• Indian Institute of Science - Bangalore - Índia (8)
• Institutional Repository of Leibniz University Hannover (3)
• Martin Luther Universitat Halle Wittenberg, Germany (1)
• National Center for Biotechnology Information - NCBI (1)
• Portal de Revistas Científicas Complutenses - Espanha (3)
• Publishing Network for Geoscientific & Environmental Data (3)
• Queensland University of Technology - ePrints Archive (18)
• SerWisS - Server für Wissenschaftliche Schriften der Fachhochschule Hannover (1)
• Universitätsbibliothek Kassel, Universität Kassel, Germany (13)
• University of Michigan (226)
• USA Library of Congress (1)