Content Provider
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Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual)
1
Universidad de Costa Rica: Repositorio Kérwá
1
Universitat Politècnica de Catalunya (UPC): Theses and Dissertations Online (TDX)
1
Universitat Politècnica de Catalunya, BarcelonaTech: UPCommons - Global access to UPC knowledge
1
University of British Columbia: cIRcle - UBC's Information Repository
1
University of Calgary Journal Hosting
1
University of California: eScholarship
2
University of Florida: Digital Library Center
2
University of Georgia: Athenaeum@UGA
1
University of Lethbridge Digitized Collections
1
University of Lincoln: Lincoln Repository
1
University of Nebraska-Lincoln: DigitalCommons@UNL
2
University of Washington, Seattle: Digital Collections
4
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
1
University of the Pacific, McGeorge School of Law: Scholarly Commons
1
University of the Pacific: Scholarly Commons
1
Unknown
2
Utrecht University Repository
1
Vrije Universiteit Amsterdam (VU): Research Portal
2
Washington State University: WSU Libraries Digital Collections
2
WikiBooks - Open-content textbooks
1
Wiley Online Library (via Crossref)
1
York University Digital Library
1
Zenodo
13