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• Applied Math and Science Education Repository - Washington - USA (4)
• Aquatic Commons (5)
• Archive of European Integration (7)
• Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (1)
• Biodiversity Heritage Library, United States (14)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (3)
• Boston University Digital Common (3)
• Brock University, Canada (18)
• Bucknell University Digital Commons - Pensilvania - USA (1)
• CentAUR: Central Archive University of Reading - UK (2)
• Comissão Econômica para a América Latina e o Caribe (CEPAL) (1)
• Dalarna University College Electronic Archive (1)
• Digital Commons @ DU | University of Denver Research (1)
• Digital Commons at Florida International University (4)
• DigitalCommons@The Texas Medical Center (5)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (1)
• Duke University (2)
• Harvard University (7)
• INSTITUTO DE PESQUISAS ENERGÉTICAS E NUCLEARES (IPEN) - Repositório Digital da Produção Técnico Científica - BibliotecaTerezine Arantes Ferra (1)
• Massachusetts Institute of Technology (1)
• Plymouth Marine Science Electronic Archive (PlyMSEA) (1)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (8)
• Queensland University of Technology - ePrints Archive (4)
• South Carolina State Documents Depository (1)
• Universidad del Rosario, Colombia (1)
• University of Connecticut - USA (1)
• University of Michigan (898)
• USA Library of Congress (1)