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• AMS Tesi di Dottorato - Alm@DL - Università di Bologna (2)
• Applied Math and Science Education Repository - Washington - USA (4)
• Aquatic Commons (1)
• Aston University Research Archive (1)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (4)
• Boston University Digital Common (1)
• Brock University, Canada (4)
• Cambridge University Engineering Department Publications Database (5)
• CentAUR: Central Archive University of Reading - UK (8)
• Center for Jewish History Digital Collections (2)
• Digital Commons - Michigan Tech (1)
• Digital Commons @ Winthrop University (1)
• DRUM (Digital Repository at the University of Maryland) (1)
• Harvard University (9)
• Helda - Digital Repository of University of Helsinki (1)
• Iowa Publications Online (IPO) - State Library, State of Iowa (Iowa), United States (1)
• Ministerio de Cultura, Spain (1)
• Plymouth Marine Science Electronic Archive (PlyMSEA) (502)
• Portal de Revistas Científicas Complutenses - Espanha (1)
• Publishing Network for Geoscientific & Environmental Data (320)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (17)
• Queensland University of Technology - ePrints Archive (8)
• Repositório digital da Fundação Getúlio Vargas - FGV (1)
• Repositorio Institucional de la Universidad Nacional Agraria (1)
• Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (2)
• SAPIENTIA - Universidade do Algarve - Portugal (3)
• Universidad del Rosario, Colombia (3)
• Universidade Metodista de São Paulo (1)
• Université de Lausanne, Switzerland (1)
• University of Michigan (69)
• USA Library of Congress (2)
• WestminsterResearch - UK (7)
• Worcester Research and Publications - Worcester Research and Publications - UK (2)