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• KUPS-Datenbank - Universität zu Köln - Kölner UniversitätsPublikationsServer (1)
• Applied Math and Science Education Repository - Washington - USA (7)
• Aquatic Commons (37)
• Archive of European Integration (45)
• Aston University Research Archive (2)
• Biodiversity Heritage Library, United States (20)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (2)
• Brock University, Canada (4)
• Bucknell University Digital Commons - Pensilvania - USA (4)
• Cambridge University Engineering Department Publications Database (1)
• CentAUR: Central Archive University of Reading - UK (3)
• Comissão Econômica para a América Latina e o Caribe (CEPAL) (10)
• Cornell: DigitalCommons@ILR (1)
• Dalarna University College Electronic Archive (1)
• Digital Commons - Michigan Tech (1)
• Digital Commons @ DU | University of Denver Research (3)
• Digital Commons at Florida International University (4)
• Digital Peer Publishing (1)
• DigitalCommons - The University of Maine Research (1)
• DigitalCommons@The Texas Medical Center (18)
• DigitalCommons@University of Nebraska - Lincoln (1)
• DRUM (Digital Repository at the University of Maryland) (1)
• Duke University (5)
• Harvard University (6)
• Helda - Digital Repository of University of Helsinki (4)
• Iowa Publications Online (IPO) - State Library, State of Iowa (Iowa), United States (1)
• National Center for Biotechnology Information - NCBI (5)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (9)
• Queensland University of Technology - ePrints Archive (4)
• Repositório digital da Fundação Getúlio Vargas - FGV (1)
• South Carolina State Documents Depository (2)
• University of Connecticut - USA (2)
• University of Michigan (762)
• University of Washington (1)
• USA Library of Congress (1)
• WestminsterResearch - UK (2)