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• Aston University Research Archive (2)
• Biblioteca Digital Loyola - Universidad de Deusto (5)
• Biblioteca Valenciana Digital - Ministerio de Educación, Cultura y Deporte - Valencia - Espanha (1)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (2)
• Bulgarian Digital Mathematics Library at IMI-BAS (1)
• Digital Commons at Florida International University (3)
• Digital Peer Publishing (1)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (46)
• Doria (National Library of Finland DSpace Services) - National Library of Finland, Finland (1)
• Fachlicher Dokumentenserver Paedagogik/Erziehungswissenschaften (1)
• Gallica, Bibliotheque Numerique - Bibliothèque nationale de France (French National Library) (BnF), France (36)
• Martin Luther Universitat Halle Wittenberg, Germany (1)
• Ministerio de Cultura, Spain (1)
• Repositório Científico da Universidade de Évora - Portugal (1)
• Repositório Institucional da Universidade Federal do Rio Grande do Norte (1)
• Sistema UNA-SUS (2)
• Universidade Federal do Rio Grande do Norte (UFRN) (2)
• Université de Lausanne, Switzerland (2)
• Université de Montréal (1)
• Université de Montréal, Canada (1)
• University of Michigan (64)
• University of Washington (1)