Content Provider
WikiBooks - Open-content textbooks
32
Directory of Open Access Journals: DOAJ Articles
19
LeibnizOpen (The Leibniz Association)
19
Unknown
18
DataCite Metadata Store (German National Library of Science and Technology)
10
Defense Technical Information Center: DTIC Technical Reports database
7
UNESDOC - UNESCO Digital Library
7
Copernicus Publications: E-Journals
6
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
6
University of the Pacific, McGeorge School of Law: Scholarly Commons
6
University of the Pacific: Scholarly Commons
6
Université de Nantes: HAL-UNIV-NANTES
6
Washington State University: WSU Libraries Digital Collections
6
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
5
Digital.CSIC (Spanish National Research Council)
5
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
5
Max Planck Society: MPG.PuRe
4
Niedersächsisches Online-Archiv NOA
4
The University of Utah: J. Willard Marriott Digital Library
4
Wiley Online Library
4
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
3
Cambridge University Press (via Crossref)
2
Institut national des sciences de l'Univers: HAL-INSU
2
Natural Environment Research Council: NERC Open Research Archive
2
North Dakota State University (NDSU): Digital Horizons
2
Peking University Institutional Repository (PKU IR)
2
PubMed Central (PMC)
2
Université Jean Monnet – Saint-Etienne: HAL
2
Université de Lyon: HAL
2
Wiley Online Library (via Crossref)
2
Arctic Council Repository
1
BORIS (Bern Open Repository and Information System, University of Bern)
1
DIAL@UCLouvain (Université catholique de Louvain)
1
DIAL@USL-B (Université Saint-Louis, Bruxelles)
1
DergiPark Akademik (E-Journals)
1
Ghent University Academic Bibliography
1
Guangzhou Institute of Geochemistry: GIG OpenIR (Chinese Academy of Sciences)
1
HAL Clermont Auvergne (Université Blaise Pascal Clermont-Ferrand/Université d'Auvergne)
1
HAL Lyon 1 (University Claude Bernard Lyon 1)
1
HAL Sorbonne Université
1
HELDA – University of Helsinki Open Repository
1
Harvard University: DASH - Digital Access to Scholarship at Harvard
1
IRD (Institute de recherche pour le développement): Horizon
1
Indian Instiute of Science, Bangalore: etd@IIsc (Electronic Theses and Disserations)
1
Joint Research Centre, European Commission: JRC Publications Repository
1
Kitami Institute of Technology Repository (KIT-R)
1
MDPI Open Access Publishing
1
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen)
1
Murdoch University: Murdoch Research Repository
1
North-West University, South Africa: Boloka (NWU-IR)
1
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