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• Aquatic Commons (2)
• ArchiMeD - Elektronische Publikationen der Universität Mainz - Alemanha (1)
• Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (BDPI/USP) (1)
• Biodiversity Heritage Library, United States (1)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (32)
• Boston University Digital Common (1)
• Center for Jewish History Digital Collections (3)
• Digital Peer Publishing (3)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (649)
• Doria (National Library of Finland DSpace Services) - National Library of Finland, Finland (1)
• Fachlicher Dokumentenserver Paedagogik/Erziehungswissenschaften (1)
• Gallica, Bibliotheque Numerique - Bibliothèque nationale de France (French National Library) (BnF), France (3)
• Martin Luther Universitat Halle Wittenberg, Germany (66)
• Ministerio de Cultura, Spain (1)
• Portal de Revistas Científicas Complutenses - Espanha (2)
• Publishing Network for Geoscientific & Environmental Data (2)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (1)
• ReCiL - Repositório Científico Lusófona - Grupo Lusófona, Portugal (1)
• Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (1)
• Universitätsbibliothek Kassel, Universität Kassel, Germany (5)
• Université de Montréal, Canada (2)
• University of Michigan (171)