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• AMS Tesi di Dottorato - Alm@DL - Università di Bologna (2)
• AMS Tesi di Laurea - Alm@DL - Università di Bologna (4)
• Applied Math and Science Education Repository - Washington - USA (3)
• Aquatic Commons (4)
• ArchiMeD - Elektronische Publikationen der Universität Mainz - Alemanha (14)
• Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (4)
• Biblioteca Digital de Teses e Dissertações Eletrônicas da UERJ (4)
• Biblioteca Valenciana Digital - Ministerio de Educación, Cultura y Deporte - Valencia - Espanha (3)
• Biodiversity Heritage Library, United States (7)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (71)
• Boston University Digital Common (1)
• Brock University, Canada (23)
• CentAUR: Central Archive University of Reading - UK (3)
• Center for Jewish History Digital Collections (2)
• CORA - Cork Open Research Archive - University College Cork - Ireland (2)
• Dalarna University College Electronic Archive (1)
• Deakin Research Online - Australia (3)
• Digital Commons - Michigan Tech (1)
• Digital Commons @ DU | University of Denver Research (1)
• Digital Peer Publishing (2)
• Digital Repository at Iowa State University (1)
• DigitalCommons@The Texas Medical Center (4)
• DigitalCommons@University of Nebraska - Lincoln (16)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (94)
• Gallica, Bibliotheque Numerique - Bibliothèque nationale de France (French National Library) (BnF), France (5)
• Harvard University (2)
• Helda - Digital Repository of University of Helsinki (4)
• Indian Institute of Science - Bangalore - Índia (1)
• Martin Luther Universitat Halle Wittenberg, Germany (1)
• Memoria Académica - FaHCE, UNLP - Argentina (3)
• Ministerio de Cultura, Spain (1)
• National Center for Biotechnology Information - NCBI (6)
• Plymouth Marine Science Electronic Archive (PlyMSEA) (1)
• Portal de Revistas Científicas Complutenses - Espanha (1)
• Publishing Network for Geoscientific & Environmental Data (13)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (1)
• Queensland University of Technology - ePrints Archive (4)
• Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (17)
• Universidad Autónoma de Nuevo León, Mexico (2)
• Universidad del Rosario, Colombia (4)
• Universidad Politécnica de Madrid (1)
• Universidade Federal do Pará (5)
• Universidade Metodista de São Paulo (4)
• Universitätsbibliothek Kassel, Universität Kassel, Germany (10)
• Université de Montréal, Canada (4)
• University of Connecticut - USA (2)
• University of Michigan (633)
• University of Southampton, United Kingdom (1)
• USA Library of Congress (1)
• Worcester Research and Publications - Worcester Research and Publications - UK (1)