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• Academic Archive On-line (Stockholm University; Sweden) (1)
• AMS Tesi di Laurea - Alm@DL - Università di Bologna (1)
• Applied Math and Science Education Repository - Washington - USA (37)
• Aquatic Commons (50)
• Archive of European Integration (1)
• Aston University Research Archive (1)
• Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (2)
• Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (BDPI/USP) (1)
• Biblioteca Digital de la Universidad Católica Argentina (1)
• Biodiversity Heritage Library, United States (30)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (4)
• Boston University Digital Common (1)
• Brock University, Canada (10)
• Cambridge University Engineering Department Publications Database (15)
• CentAUR: Central Archive University of Reading - UK (2)
• Center for Jewish History Digital Collections (2)
• Chinese Academy of Sciences Institutional Repositories Grid Portal (4)
• Comissão Econômica para a América Latina e o Caribe (CEPAL) (1)
• Dalarna University College Electronic Archive (1)
• Digital Archives@Colby (172)
• Digital Commons - Michigan Tech (1)
• DigitalCommons - The University of Maine Research (85)
• DigitalCommons@The Texas Medical Center (2)
• DigitalCommons@University of Nebraska - Lincoln (3)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (6)
• Gallica, Bibliotheque Numerique - Bibliothèque nationale de France (French National Library) (BnF), France (31)
• Harvard University (120)
• Helda - Digital Repository of University of Helsinki (9)
• Ministerio de Cultura, Spain (5)
• National Center for Biotechnology Information - NCBI (1)
• Plymouth Marine Science Electronic Archive (PlyMSEA) (7)
• Publishing Network for Geoscientific & Environmental Data (20)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (9)
• Queensland University of Technology - ePrints Archive (3)
• Repositório digital da Fundação Getúlio Vargas - FGV (2)
• Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (5)
• South Carolina State Documents Depository (2)
• Universidad del Rosario, Colombia (4)
• Universidade de Lisboa - Repositório Aberto (2)
• Université de Montréal, Canada (3)
• University of Michigan (318)
• USA Library of Congress (1)