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• AMS Tesi di Laurea - Alm@DL - Università di Bologna (2)
• Aquatic Commons (17)
• ArchiMeD - Elektronische Publikationen der Universität Mainz - Alemanha (6)
• Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (BDPI/USP) (1)
• Biblioteca Digital Loyola - Universidad de Deusto (2)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (355)
• CentAUR: Central Archive University of Reading - UK (1)
• Center for Jewish History Digital Collections (2)
• Digital Peer Publishing (7)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (482)
• Fachlicher Dokumentenserver Paedagogik/Erziehungswissenschaften (1)
• Gallica, Bibliotheque Numerique - Bibliothèque nationale de France (French National Library) (BnF), France (1)
• Harvard University (1)
• Helda - Digital Repository of University of Helsinki (2)
• Instituto Politécnico do Porto, Portugal (1)
• Martin Luther Universitat Halle Wittenberg, Germany (2)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (7)
• Queensland University of Technology - ePrints Archive (1)
• 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 (5)
• Universidad Politécnica de Madrid (1)
• Universitat de Girona, Spain (1)
• Universitätsbibliothek Kassel, Universität Kassel, Germany (16)
• Université de Lausanne, Switzerland (1)
• University of Michigan (83)