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• ABACUS. Repositorio de Producción Científica - Universidad Europea (1)
• Applied Math and Science Education Repository - Washington - USA (1)
• ArchiMeD - Elektronische Publikationen der Universität Mainz - Alemanha (1)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (2)
• Coffee Science - Universidade Federal de Lavras (1)
• DigitalCommons - The University of Maine Research (1)
• DigitalCommons@University of Nebraska - Lincoln (1)
• Harvard University (1)
• Portal de Revistas Científicas Complutenses - Espanha (2)
• Publishing Network for Geoscientific & Environmental Data (184)
• QSpace: Queen's University - Canada (1)
• University of Michigan (2)