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• AMS Tesi di Dottorato - Alm@DL - Università di Bologna (1)
• AMS Tesi di Laurea - Alm@DL - Università di Bologna (1)
• Applied Math and Science Education Repository - Washington - USA (201)
• Aquatic Commons (6)
• Avian Conservation and Ecology - Eletronic Cientific Hournal - Écologie et conservation des oiseaux: (5)
• Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (7)
• Bibloteca do Senado Federal do Brasil (1)
• Biodiversity Heritage Library, United States (9)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (18)
• Brock University, Canada (2)
• Bucknell University Digital Commons - Pensilvania - USA (1)
• CaltechTHESIS (1)
• Cambridge University Engineering Department Publications Database (1)
• CentAUR: Central Archive University of Reading - UK (11)
• Center for Jewish History Digital Collections (4)
• Chinese Academy of Sciences Institutional Repositories Grid Portal (4)
• Clark Digital Commons--knowledge; creativity; research; and innovation of Clark University (3)
• Dalarna University College Electronic Archive (1)
• Deakin Research Online - Australia (14)
• Digital Archives@Colby (1)
• Digital Commons - Michigan Tech (13)
• Digital Commons - Montana Tech (1)
• Digital Commons @ Winthrop University (1)
• DigitalCommons@The Texas Medical Center (2)
• DigitalCommons@University of Nebraska - Lincoln (6)
• DRUM (Digital Repository at the University of Maryland) (2)
• Duke University (2)
• eResearch Archive - Queensland Department of Agriculture; Fisheries and Forestry (2)
• FAUBA DIGITAL: Repositorio institucional científico y académico de la Facultad de Agronomia de la Universidad de Buenos Aires (1)
• Harvard University (12)
• Indian Institute of Science - Bangalore - Índia (1)
• Iowa Publications Online (IPO) - State Library, State of Iowa (Iowa), United States (1)
• Lume - Repositório Digital da Universidade Federal do Rio Grande do Sul (4)
• Ministerio de Cultura, Spain (11)
• Portal de Revistas Científicas Complutenses - Espanha (3)
• Publishing Network for Geoscientific & Environmental Data (22)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (16)
• Queensland University of Technology - ePrints Archive (20)
• ReCiL - Repositório Científico Lusófona - Grupo Lusófona, Portugal (1)
• Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (20)
• School of Medicine, Washington University, United States (2)
• Universidad del Rosario, Colombia (19)
• Universidade Federal do Rio Grande do Norte (UFRN) (2)
• Universitat de Girona, Spain (1)
• Université de Montréal, Canada (5)
• University of Connecticut - USA (1)
• University of Michigan (535)
• WestminsterResearch - UK (1)