Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
1,521
NOAA NCEI Environmental Data Archive (via DataONE)
584
PANGAEA - Data Publisher for Earth & Environmental Science
35
Defense Technical Information Center: DTIC Technical Reports database
19
Unknown
16
Directory of Open Access Journals: DOAJ Articles
12
Institute for Marine Research: Brage IMR
12
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
11
Copernicus Publications: E-Journals
8
DataCite
8
University of Bergen: Bergen Open Research Archive (BORA-UiB)
7
Max Planck Society: MPG.PuRe
6
USGS Science Data Catalog (via DataONE)
6
University of Tromsø: Munin Open Research Archive
6
University of Calgary Journal Hosting
5
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
5
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
4
Australian National University: ANU Digital Collections
4
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
3
Niedersächsisches Online-Archiv NOA
3
Polar Research (E-Journal)
3
PubMed Central (PMC)
3
Charles University CU Digital repository
2
Frontiers: Figshare
2
HighWire Press (Stanford University)
2
Institut national des sciences de l'Univers: HAL-INSU
2
NASA Technical Reports Server (NTRS)
2
Natural Environment Research Council: NERC Open Research Archive
2
Naval Postgraduate School: Calhoun
2
PeerJ Publishing
2
University College London: UCL Discovery
2
University of Copenhagen: Research
2
University of Rhode Island: DigitalCommons@URI
2
University of Southampton: e-Prints Soton
2
University of Tromsø: Septentrio Academic Publishing
2
Xiamen University Institutional Repository
2
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
1
BORIS (Bern Open Repository and Information System, University of Bern)
1
CNR Solar (Scientific Open-access Literature Archive and Repository - National Research Council)
1
Caltech Authors (California Institute of Technology)
1
Cardiff University: ORCA (Online Research @ Cardiff)
1
Czech Academy of Sciences: dKNAV
1
Digital.CSIC (Spanish National Research Council)
1
Dryad Digital Repository (Duke University)
1
Durham University: Durham Research Online
1
ETH Zürich Research Collection
1
Frontiers (Publisher)
1
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
1
Gutenberg Open Science (Open-Science-Repository of the Johannes Gutenberg-University Mainz)
1
HAL Sorbonne Université
1
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