Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
2,702
Directory of Open Access Journals: DOAJ Articles
1,270
Unknown
1,211
Natural Environment Research Council: NERC Open Research Archive
928
Research Data Australia (Australian National Data Service - ANDS)
728
LeibnizOpen (The Leibniz Association)
507
IEDA: Marine-Geo Digital Library (via DataONE)
502
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
436
Copernicus Publications: E-Journals
419
eCite UTAS (University of Tasmania)
372
University of Tasmania: UTas ePrints
320
PubMed Central (PMC)
312
Cambridge University Press
308
National Institute of Polar Research Repository, Japan
307
Université de Nantes: HAL-UNIV-NANTES
305
Niedersächsisches Online-Archiv NOA
263
University of Canterbury, Christchurch: UC Research Repository
262
Digital.CSIC (Spanish National Research Council)
219
MDPI Open Access Publishing
215
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
213
NASA Technical Reports Server (NTRS)
166
University of California: eScholarship
151
Frontiers: Figshare
140
Arctic Data Center (via DataONE)
132
Wiley Online Library
131
PANGAEA - Data Publisher for Earth & Environmental Science
127
Utrecht University Repository
126
Institut national des sciences de l'Univers: HAL-INSU
123
Australian National University: ANU Digital Collections
120
Springer Nature (via Crossref)
113
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
108
Ohio State University (OSU): Knowledge Bank
101
Université Grenoble Alpes: HAL
96
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
90
University of Southampton: e-Prints Soton
89
Defense Technical Information Center: DTIC Technical Reports database
83
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia)
83
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
79
Università degli Studi di Siena: USiena air
77
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
74
HighWire Press (Stanford University)
73
IEDA: US Antarctic Program Data Center (via DataONE)
73
National Library of Australia: Digital Collections
67
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
64
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
63
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB)
59
Magnolia press
59
Apollo - University of Cambridge Repository
57
Arctic Portal Library
57
University College London: UCL Discovery
57
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