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• Academic Archive On-line (Stockholm University; Sweden) (1)
• ArchiMeD - Elektronische Publikationen der Universität Mainz - Alemanha (1)
• CentAUR: Central Archive University of Reading - UK (3)
• Consorci de Serveis Universitaris de Catalunya (CSUC), Spain (1)
• CORA - Cork Open Research Archive - University College Cork - Ireland (1)
• Digital Commons @ DU | University of Denver Research (1)
• Digital Commons at Florida International University (1)
• DigitalCommons@University of Nebraska - Lincoln (1)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (34)
• Duke University (2)
• Fachlicher Dokumentenserver Paedagogik/Erziehungswissenschaften (2)
• Memoria Académica - FaHCE, UNLP - Argentina (3)
• Portal de Revistas Científicas Complutenses - Espanha (4)
• Repositorio Institucional de la Universidad de La Laguna (1)
• Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (6)
• Universidad Politécnica de Madrid (1)
• Université de Lausanne, Switzerland (1)
• University of Michigan (41)