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• AMS Tesi di Dottorato - Alm@DL - Università di Bologna (1)
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• Applied Math and Science Education Repository - Washington - USA (31)
• 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. (4)
• 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 (31)
• Blue Tiger Commons - Lincoln University - USA (1)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (6)
• Brock University, Canada (44)
• Bucknell University Digital Commons - Pensilvania - USA (1)
• CentAUR: Central Archive University of Reading - UK (4)
• Clark Digital Commons--knowledge; creativity; research; and innovation of Clark University (1)
• Consorci de Serveis Universitaris de Catalunya (CSUC), Spain (3)
• CUNY Academic Works (39)
• Dalarna University College Electronic Archive (1)
• Digital Commons at Florida International University (2)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (2)
• Doria (National Library of Finland DSpace Services) - National Library of Finland, Finland (2)
• Harvard University (60)
• Memoria Académica - FaHCE, UNLP - Argentina (3)
• Ministerio de Cultura, Spain (1)
• National Center for Biotechnology Information - NCBI (1)
• Portal de Revistas Científicas Complutenses - Espanha (9)
• Publishing Network for Geoscientific & Environmental Data (1)
• Repositorio Académico de la Universidad Nacional de Costa Rica (1)
• Repositorio de la Universidad de Cuenca (1)
• RUN (Repositório da Universidade Nova de Lisboa) - FCT (Faculdade de Cienecias e Technologia), Universidade Nova de Lisboa (UNL), Portugal (1)
• School of Medicine, Washington University, United States (11)
• Universidad de Alicante (2)
• Universidad del Rosario, Colombia (15)
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