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• Academic Archive On-line (Stockholm University; Sweden) (1)
• Biodiversity Heritage Library, United States (1)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (2)
• Chinese Academy of Sciences Institutional Repositories Grid Portal (1)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (1)
• Doria (National Library of Finland DSpace Services) - National Library of Finland, Finland (6)
• Gallica, Bibliotheque Numerique - Bibliothèque nationale de France (French National Library) (BnF), France (7)
• Publishing Network for Geoscientific & Environmental Data (2)
• SAPIENTIA - Universidade do Algarve - Portugal (1)
• Universidad del Rosario, Colombia (1)
• Université de Lausanne, Switzerland (1)
• University of Michigan (82)