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• Academic Archive On-line (Stockholm University; Sweden) (2)
• AMS Tesi di Laurea - Alm@DL - Università di Bologna (2)
• Aquatic Commons (1)
• ArchiMeD - Elektronische Publikationen der Universität Mainz - Alemanha (26)
• Aston University Research Archive (4)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (177)
• CentAUR: Central Archive University of Reading - UK (1)
• Center for Jewish History Digital Collections (3)
• CORA - Cork Open Research Archive - University College Cork - Ireland (1)
• Dalarna University College Electronic Archive (2)
• Digital Peer Publishing (20)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (64)
• Dokumentenserver der Akademie der Wissenschaften zu Göttingen (1)
• Fachlicher Dokumentenserver Paedagogik/Erziehungswissenschaften (21)
• 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 (233)
• Queensland University of Technology - ePrints Archive (19)
• SerWisS - Server für Wissenschaftliche Schriften der Fachhochschule Hannover (8)
• Universidade Federal do Pará (1)
• Universitätsbibliothek Kassel, Universität Kassel, Germany (50)
• Université de Lausanne, Switzerland (1)
• University of Innsbruck Digital Library - Austria (2)
• University of Michigan (13)