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• Aberystwyth University Repository - Reino Unido (1)
• AMS Tesi di Dottorato - Alm@DL - Università di Bologna (1)
• Archive of European Integration (2)
• Archivo Digital para la Docencia y la Investigación - Repositorio Institucional de la Universidad del País Vasco (5)
• Biblioteca Digital | Sistema Integrado de Documentación | UNCuyo - UNCUYO. UNIVERSIDAD NACIONAL DE CUYO. (1)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (26)
• Boston University Digital Common (42)
• Brock University, Canada (14)
• Bucknell University Digital Commons - Pensilvania - USA (1)
• Bulgarian Digital Mathematics Library at IMI-BAS (1)
• CaltechTHESIS (1)
• Cambridge University Engineering Department Publications Database (1)
• CentAUR: Central Archive University of Reading - UK (43)
• Center for Jewish History Digital Collections (2)
• Chapman University Digital Commons - CA - USA (1)
• CORA - Cork Open Research Archive - University College Cork - Ireland (6)
• Dalarna University College Electronic Archive (1)
• Digital Archives@Colby (4)
• Digital Commons - Michigan Tech (1)
• Digital Commons @ DU | University of Denver Research (1)
• Digital Commons @ Winthrop University (8)
• Digital Peer Publishing (1)
• DigitalCommons - The University of Maine Research (1)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (2)
• DRUM (Digital Repository at the University of Maryland) (1)
• Gallica, Bibliotheque Numerique - Bibliothèque nationale de France (French National Library) (BnF), France (35)
• Harvard University (51)
• Helda - Digital Repository of University of Helsinki (8)
• Memoria Académica - FaHCE, UNLP - Argentina (3)
• Ministerio de Cultura, Spain (1)
• Publishing Network for Geoscientific & Environmental Data (2)
• QSpace: Queen's University - Canada (1)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (61)
• Queensland University of Technology - ePrints Archive (19)
• ReCiL - Repositório Científico Lusófona - Grupo Lusófona, Portugal (1)
• Repositorio Académico de la Universidad Nacional de Costa Rica (1)
• Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (6)
• South Carolina State Documents Depository (4)
• Universidad Autónoma de Nuevo León, Mexico (6)
• Universidad de Alicante (3)
• Universidad Politécnica de Madrid (5)
• Universidade Federal do Pará (1)
• Universidade Federal do Rio Grande do Norte (UFRN) (1)
• Universidade Metodista de São Paulo (2)
• Universitätsbibliothek Kassel, Universität Kassel, Germany (1)
• Université de Montréal, Canada (6)
• University of Connecticut - USA (2)
• University of Michigan (577)
• WestminsterResearch - UK (2)