Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
634
PANGAEA - Data Publisher for Earth & Environmental Science
19
Unknown
8
Zenodo
7
Defense Technical Information Center: DTIC Technical Reports database
6
University of Tromsø: Munin Open Research Archive
5
Directory of Open Access Journals: DOAJ Articles
4
NOAA NCEI Environmental Data Archive (via DataONE)
4
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
4
NGU Open Archive (Geological Survey of Norway)
3
National Institute of Polar Research Repository, Japan
3
Arctic Data Center (via DataONE)
2
Frontiers: Figshare
2
Institute for Marine Research: Brage IMR
2
Natural Environment Research Council: NERC Open Research Archive
2
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
2
Polar Research (E-Journal)
2
University of Tromsø: Septentrio Academic Publishing
2
Aarhus University: Research
1
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
Cambridge University Press (via Crossref)
1
Copernicus Publications: E-Journals
1
Czech Academy of Sciences: dKNAV
1
David Rumsey Historical Map Collection (Cartography Associates)
1
Durham University: Durham e-Theses
1
GFZ Data Services (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
1
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
1
Geological Quarterly
1
German Aerospace Center: elib - DLR electronic library
1
Ghent University Academic Bibliography
1
KovsieScholar Repository (University of the Free State - UFS UV)
1
Lund University Publications (LUP)
1
NASA Technical Reports Server (NTRS)
1
The University of Melbourne: Digitised Collections
1
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
1
University of Southampton: e-Prints Soton
1
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
1