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• Aberdeen University (1)
• Acceda, el repositorio institucional de la Universidad de Las Palmas de Gran Canaria. España (2)
• AMS Tesi di Dottorato - Alm@DL - Università di Bologna (2)
• AMS Tesi di Laurea - Alm@DL - Università di Bologna (3)
• Aquatic Commons (49)
• Archive of European Integration (8)
• Archivo Digital para la Docencia y la Investigación - Repositorio Institucional de la Universidad del País Vasco (1)
• Avian Conservation and Ecology - Eletronic Cientific Hournal - Écologie et conservation des oiseaux: (1)
• Biblioteca Digital | Sistema Integrado de Documentación | UNCuyo - UNCUYO. UNIVERSIDAD NACIONAL DE CUYO. (1)
• Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (11)
• Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (BDPI/USP) (3)
• Biodiversity Heritage Library, United States (13)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (36)
• Boston University Digital Common (2)
• Brock University, Canada (4)
• Cambridge University Engineering Department Publications Database (31)
• CentAUR: Central Archive University of Reading - UK (22)
• Central European University - Research Support Scheme (1)
• Chinese Academy of Sciences Institutional Repositories Grid Portal (47)
• Cochin University of Science & Technology (CUSAT), India (1)
• Comissão Econômica para a América Latina e o Caribe (CEPAL) (1)
• CUNY Academic Works (2)
• Dalarna University College Electronic Archive (3)
• Digital Commons - Michigan Tech (2)
• Digital Knowledge Repository of Central Drug Research Institute (1)
• Digital Repository at Iowa State University (3)
• DigitalCommons - The University of Maine Research (1)
• DigitalCommons@The Texas Medical Center (1)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (26)
• Duke University (2)
• eResearch Archive - Queensland Department of Agriculture; Fisheries and Forestry (11)
• Gallica, Bibliotheque Numerique - Bibliothèque nationale de France (French National Library) (BnF), France (27)
• Greenwich Academic Literature Archive - UK (1)
• Harvard University (1)
• Helda - Digital Repository of University of Helsinki (5)
• Indian Institute of Science - Bangalore - Índia (31)
• Instituto Politécnico do Porto, Portugal (3)
• Lume - Repositório Digital da Universidade Federal do Rio Grande do Sul (1)
• Martin Luther Universitat Halle Wittenberg, Germany (1)
• Ministerio de Cultura, Spain (1)
• Plymouth Marine Science Electronic Archive (PlyMSEA) (11)
• Publishing Network for Geoscientific & Environmental Data (16)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (55)
• Queensland University of Technology - ePrints Archive (104)
• Repositório Científico do Instituto Politécnico de Lisboa - Portugal (1)
• Repositório digital da Fundação Getúlio Vargas - FGV (3)
• Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (54)
• SAPIENTIA - Universidade do Algarve - Portugal (4)
• Universidad Autónoma de Nuevo León, Mexico (1)
• Universidad de Alicante (4)
• Universidad del Rosario, Colombia (1)
• Universidad Politécnica de Madrid (8)
• Universidade Federal do Pará (1)
• Université de Lausanne, Switzerland (3)
• Université de Montréal, Canada (16)
• University of Connecticut - USA (3)
• University of Michigan (266)
• WestminsterResearch - UK (1)