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• Aquatic Commons (519)
• ArchiMeD - Elektronische Publikationen der Universität Mainz - Alemanha (3)
• Archivo Digital para la Docencia y la Investigación - Repositorio Institucional de la Universidad del País Vasco (8)
• Biblioteca Digital da Câmara dos Deputados (7)
• Biblioteca Digital de la Universidad Católica Argentina (6)
• Biblioteca Digital de Teses e Dissertações Eletrônicas da UERJ (3)
• Biodiversity Heritage Library, United States (10)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (28)
• Bucknell University Digital Commons - Pensilvania - USA (2)
• CaltechTHESIS (1)
• Cambridge University Engineering Department Publications Database (5)
• Center for Jewish History Digital Collections (43)
• Chinese Academy of Sciences Institutional Repositories Grid Portal (1)
• Dalarna University College Electronic Archive (1)
• Digital Peer Publishing (2)
• DigitalCommons@University of Nebraska - Lincoln (1)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (98)
• eResearch Archive - Queensland Department of Agriculture; Fisheries and Forestry (2)
• Fachlicher Dokumentenserver Paedagogik/Erziehungswissenschaften (4)
• Gallica, Bibliotheque Numerique - Bibliothèque nationale de France (French National Library) (BnF), France (1)
• Harvard University (1)
• Helda - Digital Repository of University of Helsinki (19)
• Helvia: Repositorio Institucional de la Universidad de Córdoba (1)
• Indian Institute of Science - Bangalore - Índia (7)
• Martin Luther Universitat Halle Wittenberg, Germany (2)
• Publishing Network for Geoscientific & Environmental Data (2)
• Queensland University of Technology - ePrints Archive (16)
• SerWisS - Server für Wissenschaftliche Schriften der Fachhochschule Hannover (1)
• Universitätsbibliothek Kassel, Universität Kassel, Germany (7)
• University of Michigan (199)