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• Acceda, el repositorio institucional de la Universidad de Las Palmas de Gran Canaria. España (1)
• Applied Math and Science Education Repository - Washington - USA (1)
• Aquatic Commons (1)
• Archive of European Integration (3)
• Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (1)
• Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (BDPI/USP) (1)
• Biodiversity Heritage Library, United States (20)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (1)
• Boston University Digital Common (3)
• Brock University, Canada (1)
• Bucknell University Digital Commons - Pensilvania - USA (3)
• CentAUR: Central Archive University of Reading - UK (1)
• Center for Jewish History Digital Collections (2)
• Chapman University Digital Commons - CA - USA (13)
• Digital Commons at Florida International University (1)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (14)
• Gallica, Bibliotheque Numerique - Bibliothèque nationale de France (French National Library) (BnF), France (81)
• Glasgow Theses Service (1)
• Harvard University (6)
• Illinois Digital Environment for Access to Learning and Scholarship Repository (1)
• Indian Institute of Science - Bangalore - Índia (1)
• Instituto Politécnico de Castelo Branco - Portugal (1)
• National Center for Biotechnology Information - NCBI (3)
• Portal de Revistas Científicas Complutenses - Espanha (2)
• Publishing Network for Geoscientific & Environmental Data (14)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (7)
• Queensland University of Technology - ePrints Archive (6)
• Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (3)
• School of Medicine, Washington University, United States (2)
• South Carolina State Documents Depository (3)
• Universidad Autónoma de Nuevo León, Mexico (1)
• Universidade de Lisboa - Repositório Aberto (1)
• Université de Montréal, Canada (1)
• University of Michigan (788)
• University of Queensland eSpace - Australia (3)
• University of Washington (2)