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• Aberystwyth University Repository - Reino Unido (2)
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• Applied Math and Science Education Repository - Washington - USA (2)
• Aquatic Commons (20)
• Archivo Digital para la Docencia y la Investigación - Repositorio Institucional de la Universidad del País Vasco (1)
• Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (BDPI/USP) (1)
• Biodiversity Heritage Library, United States (289)
• Blue Tiger Commons - Lincoln University - USA (1)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (13)
• Brock University, Canada (1)
• Cambridge University Engineering Department Publications Database (1)
• CentAUR: Central Archive University of Reading - UK (3)
• Cochin University of Science & Technology (CUSAT), India (1)
• Digital Commons @ DU | University of Denver Research (1)
• Digital Commons at Florida International University (1)
• DigitalCommons@University of Nebraska - Lincoln (1)
• DRUM (Digital Repository at the University of Maryland) (2)
• Gallica, Bibliotheque Numerique - Bibliothèque nationale de France (French National Library) (BnF), France (1)
• Greenwich Academic Literature Archive - UK (2)
• Helda - Digital Repository of University of Helsinki (1)
• Illinois Digital Environment for Access to Learning and Scholarship Repository (4)
• Memoria Académica - FaHCE, UNLP - Argentina (3)
• Publishing Network for Geoscientific & Environmental Data (1)
• Queensland University of Technology - ePrints Archive (6)
• Repositorio de la Universidad de Cuenca (1)
• Repositorio Institucional de la Universidad de El Salvador (2)
• School of Medicine, Washington University, United States (12)
• Universidad de Alicante (2)
• Universidad del Rosario, Colombia (1)
• Universidad Politécnica de Madrid (1)
• University of Michigan (606)
• University of Queensland eSpace - Australia (2)
• University of Washington (3)