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• AMS Tesi di Laurea - Alm@DL - Università di Bologna (1)
• Applied Math and Science Education Repository - Washington - USA (14)
• Aquatic Commons (1)
• Archive of European Integration (1)
• Aston University Research Archive (2)
• Avian Conservation and Ecology - Eletronic Cientific Hournal - Écologie et conservation des oiseaux: (2)
• Biblioteca Digital | Sistema Integrado de Documentación | UNCuyo - UNCUYO. UNIVERSIDAD NACIONAL DE CUYO. (2)
• Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (7)
• Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (BDPI/USP) (1)
• Biodiversity Heritage Library, United States (5)
• Blue Tiger Commons - Lincoln University - USA (2)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (9)
• Boston University Digital Common (2)
• Bucknell University Digital Commons - Pensilvania - USA (2)
• Bulgarian Digital Mathematics Library at IMI-BAS (1)
• CentAUR: Central Archive University of Reading - UK (5)
• Clark Digital Commons--knowledge; creativity; research; and innovation of Clark University (1)
• Digital Commons @ DU | University of Denver Research (1)
• Digital Commons at Florida International University (12)
• Digital Peer Publishing (1)
• Digital Repository at Iowa State University (127)
• DigitalCommons@University of Nebraska - Lincoln (3)
• DRUM (Digital Repository at the University of Maryland) (1)
• Harvard University (1)
• Iowa Publications Online (IPO) - State Library, State of Iowa (Iowa), United States (4)
• Línguas & Letras - Unoeste (1)
• Massachusetts Institute of Technology (1)
• Memoria Académica - FaHCE, UNLP - Argentina (10)
• Ministerio de Cultura, Spain (1)
• National Center for Biotechnology Information - NCBI (1)
• Portal de Revistas Científicas Complutenses - Espanha (2)
• Publishing Network for Geoscientific & Environmental Data (2)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (2)
• Queensland University of Technology - ePrints Archive (10)
• Repositorio Académico de la Universidad Nacional de Costa Rica (1)
• Repositório Alice (Acesso Livre à Informação Científica da Embrapa / Repository Open Access to Scientific Information from Embrapa) (1)
• Repositorio de la Universidad de Cuenca (2)
• Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (12)
• Universidad del Rosario, Colombia (12)
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• Universidade Técnica de Lisboa (1)
• Universitätsbibliothek Kassel, Universität Kassel, Germany (1)
• University of Michigan (698)
• University of Queensland eSpace - Australia (1)
• University of Washington (1)