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• 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. (2)
• Biodiversity Heritage Library, United States (60)
• Blue Tiger Commons - Lincoln University - USA (1)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (2)
• Brock University, Canada (8)
• Bucknell University Digital Commons - Pensilvania - USA (1)
• CentAUR: Central Archive University of Reading - UK (2)
• CUNY Academic Works (4)
• Digital Commons - Michigan Tech (1)
• Digital Commons @ DU | University of Denver Research (1)
• Digital Commons at Florida International University (1)
• DigitalCommons - The University of Maine Research (1)
• DigitalCommons@The Texas Medical Center (1)
• DigitalCommons@University of Nebraska - Lincoln (3)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (1)
• Doria (National Library of Finland DSpace Services) - National Library of Finland, Finland (1)
• Harvard University (243)
• Iowa Publications Online (IPO) - State Library, State of Iowa (Iowa), United States (1)
• Memoria Académica - FaHCE, UNLP - Argentina (18)
• Portal de Revistas Científicas Complutenses - Espanha (1)
• Publishing Network for Geoscientific & Environmental Data (58)
• Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (1)
• Universidad Autónoma de Nuevo León, Mexico (1)
• Universitätsbibliothek Kassel, Universität Kassel, Germany (1)
• Université de Lausanne, Switzerland (2)
• Université de Montréal, Canada (2)
• Université Laval Mémoires et thèses électroniques (1)
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• USA Library of Congress (25)