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• Adam Mickiewicz University Repository (1)
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• Bucknell University Digital Commons - Pensilvania - USA (2)
• Cambridge University Engineering Department Publications Database (8)
• CentAUR: Central Archive University of Reading - UK (2)
• Center for Jewish History Digital Collections (1)
• Digital Peer Publishing (1)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (59)
• Fachlicher Dokumentenserver Paedagogik/Erziehungswissenschaften (2)
• Martin Luther Universitat Halle Wittenberg, Germany (1)
• Publishing Network for Geoscientific & Environmental Data (678)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (8)
• Queensland University of Technology - ePrints Archive (7)
• Universidade Federal do Pará (1)
• University of Innsbruck Digital Library - Austria (1)
• University of Michigan (207)
• WestminsterResearch - UK (1)