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• Acceda, el repositorio institucional de la Universidad de Las Palmas de Gran Canaria. España (3)
• AMS Tesi di Laurea - Alm@DL - Università di Bologna (1)
• Applied Math and Science Education Repository - Washington - USA (19)
• Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (BDPI/USP) (2)
• Biblioteca Virtual del Sistema Sanitario Público de Andalucía (BV-SSPA), Junta de Andalucía. Consejería de Salud y Bienestar Social, Spain (1)
• Biodiversity Heritage Library, United States (6)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (2)
• Brock University, Canada (2)
• CentAUR: Central Archive University of Reading - UK (12)
• Digital Commons @ DU | University of Denver Research (1)
• Digital Commons @ Winthrop University (104)
• Digital Commons at Florida International University (4)
• DigitalCommons@The Texas Medical Center (1)
• Harvard University (8)
• Instituto Politécnico do Porto, Portugal (4)
• Iowa Publications Online (IPO) - State Library, State of Iowa (Iowa), United States (1)
• Publishing Network for Geoscientific & Environmental Data (10)
• Repositorio de la Universidad de Cuenca (1)
• Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (2)
• South Carolina State Documents Depository (606)
• Universidad del Rosario, Colombia (2)
• Universidad Politécnica de Madrid (4)
• Université de Lausanne, Switzerland (1)
• University of Michigan (190)
• University of Queensland eSpace - Australia (1)
• USA Library of Congress (7)