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• Applied Math and Science Education Repository - Washington - USA (1)
• ArchiMeD - Elektronische Publikationen der Universität Mainz - Alemanha (1)
• Aston University Research Archive (1)
• Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (BDPI/USP) (1)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (23)
• CentAUR: Central Archive University of Reading - UK (1)
• Doria (National Library of Finland DSpace Services) - National Library of Finland, Finland (1)
• Duke University (1)
• Ecology and Society (1)
• Fachlicher Dokumentenserver Paedagogik/Erziehungswissenschaften (1)
• Martin Luther Universitat Halle Wittenberg, Germany (3)
• National Center for Biotechnology Information - NCBI (3)
• Université de Lausanne, Switzerland (6)
• University of Queensland eSpace - Australia (2)