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• ArchiMeD - Elektronische Publikationen der Universität Mainz - Alemanha (4)
• Biodiversity Heritage Library, United States (10)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (2)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (27)
• Institutional Repository of Leibniz University Hannover (1)
• Martin Luther Universitat Halle Wittenberg, Germany (2)
• Publishing Network for Geoscientific & Environmental Data (16)
• Universidade Federal do Pará (1)
• University of Michigan (19)