Content Provider
University of North Texas: UNT Digital Library
115
University of California: eScholarship
95
Aarhus University: Research
29
University of Southern Denmark Research Portal
26
DataCite Metadata Store (German National Library of Science and Technology)
21
Apollo - University of Cambridge Repository
17
CDC Stacks (Centers for Disease Control and Prevention)
16
WHO (World Health Organization): Institutional Repository for Information Sharing (IRIS)
12
University of Copenhagen: Research
11
DataCite
8
Aalborg University's Research Portal
6
Royal Holloway University of London: Royal Holloway Digital Repository
6
University College London: UCL Discovery
5
University of Alberta: Era - Education and Research Archive
5
Carolina Digital Repository (UNC - University of North Carolina)
4
U.S. National Library of Medicine (NLM): Images from the History of Medicine (IHM)
4
University of Liège: ORBi (Open Repository and Bibliography)
4
University of Technology Sydney: OPUS - Open Publications of UTS Scholars
4
University of Western Sydney (UWS): Research Direct
4
Aberdeen University Research Archive (AURA)
3
Directory of Open Access Journals: DOAJ Articles
3
Imperial College London: Spiral
3
National Research Council Canada: NRC Publications Archive
3
Opin vísindi (Iceland)
3
University of Exeter: Open Research Exeter (ORE)
3
Unknown
3
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
2
CESSDA DC Data Catalogue (Consortium of European Social Science Data Archives)
2
GettDigital (Gettysburg College Digital Collections)
2
Lund University Publications (LUP)
2
Open Access Victoria University of Wellington / Te Herenga Waka
2
Royal Netherlands Academy of Arts and Sciences Research Portal (KNAW)
2
Skemman (Iceland)
2
Texas Tech University: TTU DSpace Repository
2
The University of Adelaide: Digital Library
2
U.S. Naval War College Digital Commons
2
University of Groningen research database
2
University of Nevada, Las Vegas: Digital Scholarship@UNLV
2
Universitá degli Studi di Roma "Tor Vergata": ART - Archivio Istituzionale della Ricerca
2
Victoria University of Wellington: ResearchArchive
2
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
1
Bangor University: Research Portal
1
Clark University: Clark Digital Commons
1
DRO - Deakin Research Online
1
Dalhousie University: DalSpace Institutional Repository
1
Digital Commons University of South Florida (USF)
1
Florida State University Digital Library (FSUDL)
1
Florida State University: DigiNole Commons
1
Ghent University Academic Bibliography
1
Hirsla - Landspítali University Hospital research archive
1
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