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• Biodiversity Heritage Library, United States (2)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (26)
• Dalarna University College Electronic Archive (2)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (71)
• 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 (1)
• Harvard University (1)
• Publishing Network for Geoscientific & Environmental Data (2)
• Scielo Saúde Pública - SP (1)
• Universidad Politécnica de Madrid (2)
• Université de Lausanne, Switzerland (1)
• University of Michigan (53)