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• Applied Math and Science Education Repository - Washington - USA (5)
• Archive of European Integration (6)
• Biodiversity Heritage Library, United States (44)
• 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 (4)
• Comissão Econômica para a América Latina e o Caribe (CEPAL) (1)
• Dalarna University College Electronic Archive (1)
• Digital Commons @ DU | University of Denver Research (2)
• DigitalCommons@The Texas Medical Center (6)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (1)
• Doria (National Library of Finland DSpace Services) - National Library of Finland, Finland (1)
• Harvard University (7)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (2)
• Scottish Institute for Research in Economics (SIRE) (SIRE), United Kingdom (1)
• Universidad del Rosario, Colombia (1)
• Université de Lausanne, Switzerland (1)
• University of Connecticut - USA (1)
• University of Michigan (891)
• USA Library of Congress (1)