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• Academic Archive On-line (Karlstad University; Sweden) (1)
• Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (BDPI/USP) (2)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (9)
• Cambridge University Engineering Department Publications Database (3)
• CentAUR: Central Archive University of Reading - UK (20)
• Chinese Academy of Sciences Institutional Repositories Grid Portal (4)
• Digital Commons at Florida International University (1)
• Fachlicher Dokumentenserver Paedagogik/Erziehungswissenschaften (1)
• Harvard University (2)
• Helda - Digital Repository of University of Helsinki (1)
• Indian Institute of Science - Bangalore - Índia (1)
• National Center for Biotechnology Information - NCBI (1)
• Publishing Network for Geoscientific & Environmental Data (898)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (3)
• Queensland University of Technology - ePrints Archive (5)
• Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (11)
• Research Open Access Repository of the University of East London. (1)
• SAPIENTIA - Universidade do Algarve - Portugal (1)
• Universidad Politécnica de Madrid (4)
• Universitätsbibliothek Kassel, Universität Kassel, Germany (1)
• University of Michigan (18)
• University of Queensland eSpace - Australia (1)
• USA Library of Congress (1)
• WestminsterResearch - UK (1)