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• Adam Mickiewicz University Repository (22)
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• Aquatic Commons (1)
• ArchiMeD - Elektronische Publikationen der Universität Mainz - Alemanha (28)
• Aston University Research Archive (3)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (79)
• CentAUR: Central Archive University of Reading - UK (1)
• Dalarna University College Electronic Archive (2)
• Digital Peer Publishing (14)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (50)
• Fachlicher Dokumentenserver Paedagogik/Erziehungswissenschaften (17)
• Gallica, Bibliotheque Numerique - Bibliothèque nationale de France (French National Library) (BnF), France (1)
• Helda - Digital Repository of University of Helsinki (1)
• Martin Luther Universitat Halle Wittenberg, Germany (3)
• Ministerio de Cultura, Spain (4)
• Portal de Revistas Científicas Complutenses - Espanha (4)
• Publishing Network for Geoscientific & Environmental Data (2)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (2)
• ReCiL - Repositório Científico Lusófona - Grupo Lusófona, Portugal (1)
• Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (1)
• SerWisS - Server für Wissenschaftliche Schriften der Fachhochschule Hannover (11)
• Universitätsbibliothek Kassel, Universität Kassel, Germany (41)
• Université de Montréal, Canada (1)
• University of Michigan (118)