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• KUPS-Datenbank - Universität zu Köln - Kölner UniversitätsPublikationsServer (1)
• Applied Math and Science Education Repository - Washington - USA (6)
• Aquatic Commons (38)
• Archive of European Integration (19)
• Aston University Research Archive (5)
• Biodiversity Heritage Library, United States (19)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (1)
• Brock University, Canada (2)
• Bucknell University Digital Commons - Pensilvania - USA (4)
• Cambridge University Engineering Department Publications Database (1)
• CentAUR: Central Archive University of Reading - UK (1)
• Comissão Econômica para a América Latina e o Caribe (CEPAL) (7)
• Cornell: DigitalCommons@ILR (1)
• Dalarna University College Electronic Archive (1)
• Digital Commons - Michigan Tech (1)
• Digital Commons @ DU | University of Denver Research (2)
• Digital Commons at Florida International University (19)
• 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) (5)
• Duke University (5)
• Ecology and Society (1)
• Glasgow Theses Service (1)
• Harvard University (6)
• Helda - Digital Repository of University of Helsinki (2)
• 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 (3)
• Queensland University of Technology - ePrints Archive (4)
• South Carolina State Documents Depository (2)
• Universidad del Rosario, Colombia (1)
• University of Connecticut - USA (1)
• University of Michigan (783)
• University of Queensland eSpace - Australia (3)
• University of Washington (2)
• USA Library of Congress (4)
• WestminsterResearch - UK (1)