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• Academic Archive On-line (Stockholm University; Sweden) (1)
• Acceda, el repositorio institucional de la Universidad de Las Palmas de Gran Canaria. España (2)
• AMS Tesi di Laurea - Alm@DL - Università di Bologna (3)
• Andina Digital - Repositorio UASB-Digital - Universidade Andina Simón Bolívar (1)
• Aston University Research Archive (1)
• Biblioteca Valenciana Digital - Ministerio de Educación, Cultura y Deporte - Valencia - Espanha (3)
• Biodiversity Heritage Library, United States (58)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (3)
• Brock University, Canada (12)
• CentAUR: Central Archive University of Reading - UK (1)
• Comissão Econômica para a América Latina e o Caribe (CEPAL) (1)
• Consorci de Serveis Universitaris de Catalunya (CSUC), Spain (9)
• DI-fusion - The institutional repository of Université Libre de Bruxelles (1)
• Digital Commons - Montana Tech (1)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (1)
• Diposit Digital de la UB - Universidade de Barcelona (2)
• Gallica, Bibliotheque Numerique - Bibliothèque nationale de France (French National Library) (BnF), France (2)
• Ministerio de Cultura, Spain (1)
• National Center for Biotechnology Information - NCBI (2)
• Portal de Revistas Científicas Complutenses - Espanha (1)
• Publishing Network for Geoscientific & Environmental Data (1)
• SerWisS - Server für Wissenschaftliche Schriften der Fachhochschule Hannover (1)
• South Carolina State Documents Depository (1)
• Universidad Autónoma de Nuevo León, Mexico (1)
• Universidad del Rosario, Colombia (3)
• Universidade Metodista de São Paulo (1)
• Universitätsbibliothek Kassel, Universität Kassel, Germany (1)
• Université de Lausanne, Switzerland (4)
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• University of Queensland eSpace - Australia (7)
• USA Library of Congress (1)