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• 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 (31)
• Aquatic Commons (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. (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)
• Biblioteca Digital de Teses e Dissertações Eletrônicas da UERJ (1)
• Biodiversity Heritage Library, United States (13)
• 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 (3)
• Center for Jewish History Digital Collections (7)
• Clark Digital Commons--knowledge; creativity; research; and innovation of Clark University (1)
• Cornell: DigitalCommons@ILR (1)
• CUNY Academic Works (39)
• Deakin Research Online - Australia (27)
• Digital Commons at Florida International University (2)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (2)
• DRUM (Digital Repository at the University of Maryland) (1)
• Harvard University (57)
• Memoria Académica - FaHCE, UNLP - Argentina (3)
• National Center for Biotechnology Information - NCBI (1)
• Portal de Revistas Científicas Complutenses - Espanha (14)
• Publishing Network for Geoscientific & Environmental Data (1)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (3)
• Queensland University of Technology - ePrints Archive (6)
• 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 (3)
• Universidad de Alicante (2)
• Universidad del Rosario, Colombia (15)
• Universidade de Lisboa - Repositório Aberto (1)
• Universitat de Girona, Spain (1)
• Universitätsbibliothek Kassel, Universität Kassel, Germany (2)
• Université de Montréal, Canada (1)
• Université Laval Mémoires et thèses électroniques (1)
• University of Michigan (639)
• University of Queensland eSpace - Australia (4)
• USA Library of Congress (9)
• WestminsterResearch - UK (2)