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• Aberystwyth University Repository - Reino Unido (3)
• Aquatic Commons (28)
• Archivo Digital para la Docencia y la Investigación - Repositorio Institucional de la Universidad del País Vasco (3)
• Biblioteca Digital de Teses e Dissertações Eletrônicas da UERJ (1)
• Biodiversity Heritage Library, United States (39)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (1)
• Boston University Digital Common (10)
• CaltechTHESIS (1)
• Center for Jewish History Digital Collections (2)
• Deakin Research Online - Australia (4)
• DI-fusion - The institutional repository of Université Libre de Bruxelles (2)
• Doria (National Library of Finland DSpace Services) - National Library of Finland, Finland (2)
• Funes: Repositorio digital de documentos en Educación Matemática - Colombia (1)
• Gallica, Bibliotheque Numerique - Bibliothèque nationale de France (French National Library) (BnF), France (492)
• Harvard University (9)
• Helda - Digital Repository of University of Helsinki (1)
• Indian Institute of Science - Bangalore - Índia (1)
• Instituto Politécnico de Castelo Branco - Portugal (1)
• Publishing Network for Geoscientific & Environmental Data (1)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (58)
• Queensland University of Technology - ePrints Archive (11)
• Université de Lausanne, Switzerland (2)
• University of Michigan (327)