Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
581
PANGAEA - Data Publisher for Earth & Environmental Science
191
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
39
Defense Technical Information Center: DTIC Technical Reports database
25
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
24
Unknown
16
Directory of Open Access Journals: DOAJ Articles
11
Naval Postgraduate School: Calhoun
11
Copernicus Publications: E-Journals
8
Polar Research (E-Journal)
7
Springer Nature (via Crossref)
7
HighWire Press (Stanford University)
6
Natural Environment Research Council: NERC Open Research Archive
6
University of Tromsø: Munin Open Research Archive
6
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen)
5
NASA Technical Reports Server (NTRS)
5
Niedersächsisches Online-Archiv NOA
5
Arctic Data Center (via DataONE)
4
Digital.CSIC (Spanish National Research Council)
4
University of Bergen: Bergen Open Research Archive (BORA-UiB)
4
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
3
Cambridge University Press
3
GEO-LEOe-docs (FID GEO)
3
MDPI Open Access Publishing
3
Max Planck Society: MPG.PuRe
3
Norsk Polarinstitutt: Brage NP
3
Norwegian Polar Institute: Brage NP
3
PubMed Central (PMC)
3
ScienceDirect (Elsevier)
3
Technical University of Denmark: DTU Orbit
3
University College London: UCL Discovery
3
University of Southampton: e-Prints Soton
3
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
3
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
2
Frontiers: Figshare
2
HAL Sorbonne Université
2
Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto
2
Institut national des sciences de l'Univers: HAL-INSU
2
Oxford University Press (via Crossref)
2
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
2
University of California: eScholarship
2
University of the Highlands and Islands: Research Database of UHI
2
Université de Nantes: HAL-UNIV-NANTES
2
Utrecht University Repository
2
Wiley Online Library
2
Aarhus University: OJS at The State and University Library
1
Apollo - University of Cambridge Repository
1
Arctic Portal Library
1
CyberLeninka (Scientific Electronic Library)
1
DataverseNO
1
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