Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
14,012
PANGAEA - Data Publisher for Earth & Environmental Science
889
Directory of Open Access Journals: DOAJ Articles
664
Unknown
552
Arctic Data Center (via DataONE)
486
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
357
Copernicus Publications: E-Journals
253
Natural Environment Research Council: NERC Open Research Archive
246
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
199
Zenodo
194
NASA Technical Reports Server (NTRS)
180
PubMed Central (PMC)
180
Niedersächsisches Online-Archiv NOA
179
Research Data Australia (Australian National Data Service - ANDS)
171
Wiley Online Library
165
Defense Technical Information Center: DTIC Technical Reports database
164
Cambridge University Press
160
LeibnizOpen (The Leibniz Association)
134
MDPI Open Access Publishing
122
University of Calgary Journal Hosting
121
Université de Nantes: HAL-UNIV-NANTES
113
eCite UTAS (University of Tasmania)
109
Springer Nature (via Crossref)
101
NOAA NCEI Environmental Data Archive (via DataONE)
94
Institut national des sciences de l'Univers: HAL-INSU
89
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
Informa (via Crossref)
70
David Rumsey Historical Map Collection (Cartography Associates)
69
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
66
University of Tasmania: UTas ePrints
65
Frontiers: Figshare
63
ScienceDirect (Elsevier - via Crossref)
61
Ohio State University (OSU): Knowledge Bank
60
Arctic Institute of North America
59
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
Arctic and Antarctic Research (E-Journal)
45
DIAL@USL-B (Université Saint-Louis, Bruxelles)
42
HAL Sorbonne Université
42
Australian National University: ANU Digital Collections
40
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
39
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
38
University of Tromsø: Munin Open Research Archive
38
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
36
WikiBooks - Open-content textbooks
36
The Royal Society
33
more ...