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• Academic Archive On-line (Stockholm University; Sweden) (1)
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• Avian Conservation and Ecology - Eletronic Cientific Hournal - Écologie et conservation des oiseaux: (1)
• Biblioteca Digital | Sistema Integrado de Documentación | UNCuyo - UNCUYO. UNIVERSIDAD NACIONAL DE CUYO. (2)
• Biodiversity Heritage Library, United States (19)
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• BORIS: Bern Open Repository and Information System - Berna - Suiça (7)
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• Center for Jewish History Digital Collections (17)
• Chinese Academy of Sciences Institutional Repositories Grid Portal (1)
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• Digital Commons - Michigan Tech (1)
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• Portal de Revistas Científicas Complutenses - Espanha (2)
• Publishing Network for Geoscientific & Environmental Data (62)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (2)
• Queensland University of Technology - ePrints Archive (3)
• Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (2)
• South Carolina State Documents Depository (3)
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• USA Library of Congress (34)