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• Aberystwyth University Repository - Reino Unido (2)
• Academic Research Repository at Institute of Developing Economies (1)
• AMS Tesi di Dottorato - Alm@DL - Università di Bologna (1)
• AMS Tesi di Laurea - Alm@DL - Università di Bologna (8)
• Aquatic Commons (4)
• ArchiMeD - Elektronische Publikationen der Universität Mainz - Alemanha (1)
• Archive of European Integration (8)
• Archivo Digital para la Docencia y la Investigación - Repositorio Institucional de la Universidad del País Vasco (1)
• Biblioteca Digital | Sistema Integrado de Documentación | UNCuyo - UNCUYO. UNIVERSIDAD NACIONAL DE CUYO. (2)
• Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (BDPI/USP) (1)
• Biblioteca Digital de la Universidad Católica Argentina (1)
• Biblioteca Valenciana Digital - Ministerio de Educación, Cultura y Deporte - Valencia - Espanha (2)
• Bibloteca do Senado Federal do Brasil (4)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (15)
• Boston University Digital Common (3)
• Brock University, Canada (3)
• CaltechTHESIS (2)
• Cámara de Comercio de Bogotá, Colombia (3)
• Cambridge University Engineering Department Publications Database (69)
• CentAUR: Central Archive University of Reading - UK (14)
• Chinese Academy of Sciences Institutional Repositories Grid Portal (3)
• Cochin University of Science & Technology (CUSAT), India (1)
• Comissão Econômica para a América Latina e o Caribe (CEPAL) (6)
• CORA - Cork Open Research Archive - University College Cork - Ireland (1)
• Cornell: DigitalCommons@ILR (2)
• CUNY Academic Works (1)
• Dalarna University College Electronic Archive (1)
• Digital Commons - Michigan Tech (2)
• Digital Commons @ DU | University of Denver Research (2)
• Digital Commons @ Winthrop University (1)
• DigitalCommons@University of Nebraska - Lincoln (1)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (1)
• Duke University (1)
• Gallica, Bibliotheque Numerique - Bibliothèque nationale de France (French National Library) (BnF), France (434)
• Greenwich Academic Literature Archive - UK (10)
• Indian Institute of Science - Bangalore - Índia (108)
• Instituto Politécnico do Porto, Portugal (1)
• Massachusetts Institute of Technology (1)
• Ministerio de Cultura, Spain (6)
• National Center for Biotechnology Information - NCBI (12)
• Publishing Network for Geoscientific & Environmental Data (20)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (30)
• Queensland University of Technology - ePrints Archive (30)
• Repositório Científico do Instituto Politécnico de Lisboa - Portugal (1)
• Repositório digital da Fundação Getúlio Vargas - FGV (2)
• Repositório Institucional da Universidade de Aveiro - Portugal (1)
• Repositorio Institucional de la Universidad Nacional Agraria (3)
• Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (37)
• Research Open Access Repository of the University of East London. (1)
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• WestminsterResearch - UK (2)