Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
3,976
Research Data Australia (Australian National Data Service - ANDS)
66
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
25
LeibnizOpen (The Leibniz Association)
21
NOAA NCEI Environmental Data Archive (via DataONE)
19
Unknown
18
WikiBooks - Open-content textbooks
14
Directory of Open Access Journals: DOAJ Articles
12
Frontiers: Figshare
7
University of California: eScholarship
7
Natural Environment Research Council: NERC Open Research Archive
6
PANGAEA - Data Publisher for Earth & Environmental Science
6
Copernicus Publications: E-Journals
5
Niedersächsisches Online-Archiv NOA
5
Digital.CSIC (Spanish National Research Council)
4
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
4
Université de Nantes: HAL-UNIV-NANTES
4
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
3
Archives ouvertes de Paris-Saclay
3
HAL Sorbonne Université
3
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
3
National Institute of Polar Research Repository, Japan
3
Oxford University Press (via Crossref)
3
PubMed Central (PMC)
3
Wageningen UR (University & Research Centre): Digital Library
3
Wiley Online Library
3
Aix-Marseille Université: HAL
2
BORIS (Bern Open Repository and Information System, University of Bern)
2
Cambridge University Press
2
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
2
Frontiers (Publisher)
2
IEDA: US Antarctic Program Data Center (via DataONE)
2
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen)
2
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
2
Technical University of Denmark: DTU Orbit
2
Universitat Politècnica de Catalunya (UPC): Theses and Dissertations Online (TDX)
2
W&M ScholarWorks
2
Xiamen University Institutional Repository
2
ASM Journals (American Society for Microbiology)
1
Aarhus University: Research
1
Canadian Science Publishing (via Crossref)
1
CentAUR: Central Archive at the University of Reading
1
Curtin University: espace
1
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB)
1
DIAL@UCLouvain (Université catholique de Louvain)
1
DIAL@USL-B (Université Saint-Louis, Bruxelles)
1
Defense Technical Information Center: DTIC Technical Reports database
1
Digital Commons University of South Florida (USF)
1
Duke University Libraries: DukeSpace
1
EPHE (Ecole pratique des hautes études, Paris): HAL
1
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