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• Acceda, el repositorio institucional de la Universidad de Las Palmas de Gran Canaria. España (3)
• Aquatic Commons (33)
• Avian Conservation and Ecology - Eletronic Cientific Hournal - Écologie et conservation des oiseaux: (1)
• Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (2)
• Bibloteca do Senado Federal do Brasil (11)
• Biodiversity Heritage Library, United States (3)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (7)
• Brock University, Canada (12)
• Bucknell University Digital Commons - Pensilvania - USA (1)
• CaltechTHESIS (1)
• Cambridge University Engineering Department Publications Database (24)
• CentAUR: Central Archive University of Reading - UK (1)
• Center for Jewish History Digital Collections (5)
• Chapman University Digital Commons - CA - USA (1)
• Chinese Academy of Sciences Institutional Repositories Grid Portal (1)
• Digital Commons - Michigan Tech (2)
• Digital Commons at Florida International University (3)
• DigitalCommons@The Texas Medical Center (305)
• DigitalCommons@University of Nebraska - Lincoln (6)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (2)
• DRUM (Digital Repository at the University of Maryland) (1)
• eResearch Archive - Queensland Department of Agriculture; Fisheries and Forestry (6)
• Greenwich Academic Literature Archive - UK (1)
• Harvard University (4)
• Helda - Digital Repository of University of Helsinki (2)
• Indian Institute of Science - Bangalore - Índia (17)
• Memoria Académica - FaHCE, UNLP - Argentina (3)
• National Center for Biotechnology Information - NCBI (2)
• Publishing Network for Geoscientific & Environmental Data (5)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (2)
• Queensland University of Technology - ePrints Archive (145)
• Repositorio Academico Digital UANL (4)
• Repositório digital da Fundação Getúlio Vargas - FGV (1)
• Repositorio Institucional de la Universidad Nacional Agraria (5)
• Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (2)
• Universidad Autónoma de Nuevo León, Mexico (6)
• Universidad del Rosario, Colombia (1)
• Universidad Politécnica de Madrid (3)
• Universidade Complutense de Madrid (1)
• University of Michigan (355)
• University of Washington (1)