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• Applied Math and Science Education Repository - Washington - USA (2)
• Aquatic Commons (386)
• 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: (2)
• Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (BDPI/USP) (14)
• Biodiversity Heritage Library, United States (7)
• Brock University, Canada (1)
• Cambridge University Engineering Department Publications Database (5)
• CentAUR: Central Archive University of Reading - UK (57)
• Chinese Academy of Sciences Institutional Repositories Grid Portal (71)
• Cochin University of Science & Technology (CUSAT), India (41)
• CORA - Cork Open Research Archive - University College Cork - Ireland (2)
• Dalarna University College Electronic Archive (1)
• Digital Archives@Colby (1)
• DigitalCommons - The University of Maine Research (7)
• Doria (National Library of Finland DSpace Services) - National Library of Finland, Finland (1)
• Duke University (4)
• eResearch Archive - Queensland Department of Agriculture; Fisheries and Forestry (20)
• Gallica, Bibliotheque Numerique - Bibliothèque nationale de France (French National Library) (BnF), France (2)
• Greenwich Academic Literature Archive - UK (1)
• Harvard University (26)
• Helda - Digital Repository of University of Helsinki (10)
• Indian Institute of Science - Bangalore - Índia (14)
• Instituto Politécnico do Porto, Portugal (1)
• Plymouth Marine Science Electronic Archive (PlyMSEA) (156)
• Publishing Network for Geoscientific & Environmental Data (1)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (65)
• Queensland University of Technology - ePrints Archive (56)
• Repositório Científico do Instituto Politécnico de Lisboa - Portugal (1)
• Repositório Institucional da Universidade de Aveiro - Portugal (5)
• Repositorio Institucional de la Universidad Nacional Agraria (1)
• RUN (Repositório da Universidade Nova de Lisboa) - FCT (Faculdade de Cienecias e Technologia), Universidade Nova de Lisboa (UNL), Portugal (1)
• SAPIENTIA - Universidade do Algarve - Portugal (18)
• South Carolina State Documents Depository (1)
• Universidade de Lisboa - Repositório Aberto (1)
• Universitat de Girona, Spain (4)
• Universitätsbibliothek Kassel, Universität Kassel, Germany (2)
• University of Michigan (3)
• University of Washington (1)