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• Acceda, el repositorio institucional de la Universidad de Las Palmas de Gran Canaria. España (1)
• Aquatic Commons (1)
• Aston University Research Archive (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. (9)
• Biblioteca Digital de la Universidad Católica Argentina (1)
• Biodiversity Heritage Library, United States (15)
• Blue Tiger Commons - Lincoln University - USA (1)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (18)
• Brock University, Canada (11)
• Bucknell University Digital Commons - Pensilvania - USA (1)
• CentAUR: Central Archive University of Reading - UK (3)
• Center for Jewish History Digital Collections (48)
• Comissão Econômica para a América Latina e o Caribe (CEPAL) (1)
• CUNY Academic Works (39)
• DI-fusion - The institutional repository of Université Libre de Bruxelles (1)
• Digital Commons @ DU | University of Denver Research (1)
• DigitalCommons@University of Nebraska - Lincoln (3)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (4)
• Gallica, Bibliotheque Numerique - Bibliothèque nationale de France (French National Library) (BnF), France (12)
• Harvard University (269)
• Memoria Académica - FaHCE, UNLP - Argentina (38)
• Ministerio de Cultura, Spain (2)
• Portal de Revistas Científicas Complutenses - Espanha (6)
• Publishing Network for Geoscientific & Environmental Data (3)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (2)
• Queensland University of Technology - ePrints Archive (2)
• Savoirs UdeS : plateforme de diffusion de la production intellectuelle de l’Université de Sherbrooke - Canada (1)
• Universidad Autónoma de Nuevo León, Mexico (1)
• Universidad de Alicante (2)
• Universidad del Rosario, Colombia (16)
• Universidad Politécnica de Madrid (2)
• Universitätsbibliothek Kassel, Universität Kassel, Germany (1)
• Université de Lausanne, Switzerland (1)
• Université de Montréal, Canada (1)
• University of Michigan (437)
• USA Library of Congress (20)