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• Academic Archive On-line (Stockholm University; Sweden) (1)
• AMS Tesi di Dottorato - Alm@DL - Università di Bologna (1)
• AMS Tesi di Laurea - Alm@DL - Università di Bologna (1)
• Applied Math and Science Education Repository - Washington - USA (1)
• Aquatic Commons (1)
• Archive of European Integration (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. (3)
• Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (2)
• Biodiversity Heritage Library, United States (8)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (6)
• Brock University, Canada (43)
• Bucknell University Digital Commons - Pensilvania - USA (1)
• CentAUR: Central Archive University of Reading - UK (2)
• Center for Jewish History Digital Collections (7)
• Chapman University Digital Commons - CA - USA (2)
• Clark Digital Commons--knowledge; creativity; research; and innovation of Clark University (1)
• Comissão Econômica para a América Latina e o Caribe (CEPAL) (1)
• Cornell: DigitalCommons@ILR (1)
• CUNY Academic Works (66)
• Digital Commons at Florida International University (6)
• DigitalCommons@The Texas Medical Center (1)
• DigitalCommons@University of Nebraska - Lincoln (1)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (3)
• DRUM (Digital Repository at the University of Maryland) (2)
• Harvard University (42)
• Iowa Publications Online (IPO) - State Library, State of Iowa (Iowa), United States (1)
• Ministerio de Cultura, Spain (1)
• Portal de Revistas Científicas Complutenses - Espanha (6)
• Publishing Network for Geoscientific & Environmental Data (3)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (5)
• Queensland University of Technology - ePrints Archive (12)
• Repositorio de la Universidad de Cuenca (1)
• Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (1)
• RUN (Repositório da Universidade Nova de Lisboa) - FCT (Faculdade de Cienecias e Technologia), Universidade Nova de Lisboa (UNL), Portugal (1)
• Savoirs UdeS : plateforme de diffusion de la production intellectuelle de l’Université de Sherbrooke - Canada (1)
• School of Medicine, Washington University, United States (4)
• Universidad de Alicante (2)
• Universidad Politécnica de Madrid (1)
• Universidade de Lisboa - Repositório Aberto (1)
• Universitat de Girona, Spain (1)
• Universitätsbibliothek Kassel, Universität Kassel, Germany (3)
• Université de Montréal, Canada (1)
• University of Michigan (675)
• University of Queensland eSpace - Australia (4)
• USA Library of Congress (10)
• WestminsterResearch - UK (1)