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• Applied Math and Science Education Repository - Washington - USA (2)
• Aquatic Commons (8)
• Archive of European Integration (8)
• Aston University Research Archive (1)
• Biodiversity Heritage Library, United States (13)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (4)
• 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) (4)
• Dalarna University College Electronic Archive (1)
• Digital Commons @ DU | University of Denver Research (3)
• Digital Commons at Florida International University (1)
• DigitalCommons@The Texas Medical Center (6)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (1)
• Duke University (4)
• Harvard University (7)
• Iowa Publications Online (IPO) - State Library, State of Iowa (Iowa), United States (1)
• Plymouth Marine Science Electronic Archive (PlyMSEA) (1)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (9)
• Queensland University of Technology - ePrints Archive (4)
• South Carolina State Documents Depository (1)
• Universidad del Rosario, Colombia (1)
• University of Connecticut - USA (2)
• University of Michigan (887)
• USA Library of Congress (2)