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• Academic Archive On-line (Stockholm University; Sweden) (1)
• AMS Tesi di Dottorato - Alm@DL - Università di Bologna (2)
• AMS Tesi di Laurea - Alm@DL - Università di Bologna (1)
• Applied Math and Science Education Repository - Washington - USA (6)
• Aquatic Commons (85)
• ArchiMeD - Elektronische Publikationen der Universität Mainz - Alemanha (1)
• Biblioteca Digital | Sistema Integrado de Documentación | UNCuyo - UNCUYO. UNIVERSIDAD NACIONAL DE CUYO. (3)
• Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (1)
• Biblioteca Digital de la Universidad Católica Argentina (4)
• Biodiversity Heritage Library, United States (2)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (2)
• Boston University Digital Common (1)
• Brock University, Canada (69)
• Bucknell University Digital Commons - Pensilvania - USA (2)
• Cambridge University Engineering Department Publications Database (1)
• CentAUR: Central Archive University of Reading - UK (9)
• Center for Jewish History Digital Collections (1)
• Digital Commons - Michigan Tech (1)
• Digital Commons @ DU | University of Denver Research (2)
• Digital Commons @ Winthrop University (3)
• Digital Commons at Florida International University (1)
• DigitalCommons - The University of Maine Research (2)
• DigitalCommons@University of Nebraska - Lincoln (19)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (1)
• Duke University (1)
• Glasgow Theses Service (1)
• Greenwich Academic Literature Archive - UK (1)
• Harvard University (13)
• Helda - Digital Repository of University of Helsinki (3)
• Memoria Académica - FaHCE, UNLP - Argentina (7)
• Plymouth Marine Science Electronic Archive (PlyMSEA) (6)
• Portal de Revistas Científicas Complutenses - Espanha (5)
• Publishing Network for Geoscientific & Environmental Data (374)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (13)
• Queensland University of Technology - ePrints Archive (3)
• Repositório Científico do Instituto Politécnico de Lisboa - Portugal (1)
• Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (1)
• RUN (Repositório da Universidade Nova de Lisboa) - FCT (Faculdade de Cienecias e Technologia), Universidade Nova de Lisboa (UNL), Portugal (1)
• South Carolina State Documents Depository (2)
• Universidad Autónoma de Nuevo León, Mexico (1)
• Universidad de Alicante (1)
• Universidad del Rosario, Colombia (3)
• Universidad Politécnica de Madrid (1)
• Universidade Federal do Pará (1)
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• Université de Montréal, Canada (4)
• University of Michigan (302)
• University of Queensland eSpace - Australia (3)
• University of Washington (2)
• USA Library of Congress (5)
• WestminsterResearch - UK (1)