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• AMS Tesi di Dottorato - Alm@DL - Università di Bologna (2)
• Applied Math and Science Education Repository - Washington - USA (32)
• Aquatic Commons (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. (1)
• Biodiversity Heritage Library, United States (48)
• Blue Tiger Commons - Lincoln University - USA (2)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (3)
• Boston University Digital Common (2)
• Brock University, Canada (4)
• Cambridge University Engineering Department Publications Database (5)
• CentAUR: Central Archive University of Reading - UK (3)
• Center for Jewish History Digital Collections (1)
• Chapman University Digital Commons - CA - USA (6)
• Chinese Academy of Sciences Institutional Repositories Grid Portal (2)
• Cornell: DigitalCommons@ILR (8)
• Digital Commons - Michigan Tech (1)
• Digital Repository at Iowa State University (1)
• DigitalCommons@The Texas Medical Center (1)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (1)
• Duke University (1)
• Greenwich Academic Literature Archive - UK (1)
• Harvard University (12)
• Indian Institute of Science - Bangalore - Índia (1)
• Infoteca EMBRAPA (1)
• Memoria Académica - FaHCE, UNLP - Argentina (3)
• National Center for Biotechnology Information - NCBI (1)
• Portal de Revistas Científicas Complutenses - Espanha (5)
• Publishing Network for Geoscientific & Environmental Data (2)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (4)
• Queensland University of Technology - ePrints Archive (21)
• Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (1)
• The Scholarly Commons | School of Hotel Administration; Cornell University Research (4)
• Universidad de Alicante (1)
• Universidad del Rosario, Colombia (56)
• Universidade de Lisboa - Repositório Aberto (1)
• University of Michigan (710)
• University of Queensland eSpace - Australia (1)