Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
14,385
PANGAEA - Data Publisher for Earth & Environmental Science
839
Directory of Open Access Journals: DOAJ Articles
657
Unknown
545
Arctic Data Center (via DataONE)
486
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
343
Copernicus Publications: E-Journals
253
Natural Environment Research Council: NERC Open Research Archive
229
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
193
Zenodo
193
NASA Technical Reports Server (NTRS)
180
Niedersächsisches Online-Archiv NOA
179
PubMed Central (PMC)
177
Research Data Australia (Australian National Data Service - ANDS)
171
Defense Technical Information Center: DTIC Technical Reports database
164
Cambridge University Press
156
LeibnizOpen (The Leibniz Association)
134
MDPI Open Access Publishing
122
Université de Nantes: HAL-UNIV-NANTES
110
eCite UTAS (University of Tasmania)
102
Springer Nature (via Crossref)
99
NOAA NCEI Environmental Data Archive (via DataONE)
94
Institut national des sciences de l'Univers: HAL-INSU
87
Digital.CSIC (Spanish National Research Council)
80
University of California: eScholarship
75
National Institute of Polar Research Repository, Japan
72
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
71
David Rumsey Historical Map Collection (Cartography Associates)
69
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
66
University of Calgary Journal Hosting
64
Frontiers: Figshare
63
University of Tasmania: UTas ePrints
62
ScienceDirect (Elsevier - via Crossref)
61
Ohio State University (OSU): Knowledge Bank
60
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
51
Max Planck Society: MPG.PuRe
49
Arctic Portal Library
45
DIAL@USL-B (Université Saint-Louis, Bruxelles)
42
Australian National University: ANU Digital Collections
40
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
38
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
38
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
36
Oxford University Press (via Crossref)
36
WikiBooks - Open-content textbooks
36
ArXiv.org (Cornell University Library)
31
Informa (via Crossref)
30
University of Southampton: e-Prints Soton
29
University of Tromsø: Munin Open Research Archive
29
CentAUR: Central Archive at the University of Reading
26
Lund University Publications (LUP)
26
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