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• AMS Tesi di Laurea - Alm@DL - Università di Bologna (1)
• Aquatic Commons (82)
• Archive of European Integration (1)
• Avian Conservation and Ecology - Eletronic Cientific Hournal - Écologie et conservation des oiseaux: (1)
• Biblioteca Digital de la Universidad Católica Argentina (1)
• Biodiversity Heritage Library, United States (19)
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• Cambridge University Engineering Department Publications Database (3)
• CentAUR: Central Archive University of Reading - UK (2)
• Center for Jewish History Digital Collections (7)
• Chinese Academy of Sciences Institutional Repositories Grid Portal (1)
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• Digital Commons @ DU | University of Denver Research (2)
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• Digital Commons at Florida International University (3)
• DigitalCommons - The University of Maine Research (4)
• DigitalCommons@University of Nebraska - Lincoln (21)
• DRUM (Digital Repository at the University of Maryland) (1)
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• Illinois Digital Environment for Access to Learning and Scholarship Repository (1)
• Indian Institute of Science - Bangalore - Índia (3)
• Iowa Publications Online (IPO) - State Library, State of Iowa (Iowa), United States (2)
• Memorial University Research Repository (1)
• Plymouth Marine Science Electronic Archive (PlyMSEA) (6)
• Portal de Revistas Científicas Complutenses - Espanha (1)
• Publishing Network for Geoscientific & Environmental Data (128)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (8)
• Queensland University of Technology - ePrints Archive (31)
• Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (5)
• South Carolina State Documents Depository (1)
• Universidad del Rosario, Colombia (1)
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• Université Laval Mémoires et thèses électroniques (2)
• University of Michigan (599)
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