Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
755
NOAA NCEI Environmental Data Archive (via DataONE)
148
Directory of Open Access Journals: DOAJ Articles
78
Unknown
78
PANGAEA - Data Publisher for Earth & Environmental Science
73
University of Calgary Journal Hosting
47
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
39
Defense Technical Information Center: DTIC Technical Reports database
35
Aarhus University: Research
33
Copernicus Publications: E-Journals
26
Arctic Data Center (via DataONE)
24
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
23
Niedersächsisches Online-Archiv NOA
20
Zenodo
19
Université de Nantes: HAL-UNIV-NANTES
17
Aarhus University: OJS at The State and University Library
15
Canadian Science Publishing (via Crossref)
15
Tidsskrift.dk (The Royal Library, Denmark)
15
Institut national des sciences de l'Univers: HAL-INSU
14
Canadian Science Publishing
13
David Rumsey Historical Map Collection (Cartography Associates)
13
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
13
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
12
PubMed Central (PMC)
11
NASA Technical Reports Server (NTRS)
9
The Portal to Texas History (University of North Texas)
9
Wiley Online Library (via Crossref)
9
Cambridge University Press
8
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen)
8
Springer Nature (via Crossref)
8
University of Alberta: Era - Education and Research Archive
8
University of Tromsø: Septentrio Academic Publishing
8
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
7
Durham University: Durham Research Online
7
MDPI Open Access Publishing
7
Natural Environment Research Council: NERC Open Research Archive
7
ScienceDirect (Elsevier - via Crossref)
7
Technical University of Denmark: DTU Orbit
7
Wiley Online Library
7
EPHE (Ecole pratique des hautes études, Paris): HAL
6
University College London: UCL Discovery
6
University of Copenhagen: Research
6
University of St Andrews: Research Portal
6
Université de Bretagne Occidentale: HAL
6
GEUS Bulletin (Geological Survey of Denmark and Greenland)
5
HighWire Press (Stanford University)
5
Max Planck Society: MPG.PuRe
5
Polar Research (E-Journal)
5
University of Southampton: e-Prints Soton
5
University of Tromsø: Munin Open Research Archive
5
more ...