Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
1,262
NOAA NCEI Environmental Data Archive (via DataONE)
19
Unknown
11
Directory of Open Access Journals: DOAJ Articles
10
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
7
Defense Technical Information Center: DTIC Technical Reports database
7
Arctic Data Center (via DataONE)
6
Copernicus Publications: E-Journals
6
PubMed Central (PMC)
5
Wiley Online Library
5
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
5
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
4
Niedersächsisches Online-Archiv NOA
4
Université de Nantes: HAL-UNIV-NANTES
4
Vrije Universiteit Amsterdam (VU): Research Portal
4
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
3
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
3
Apollo - University of Cambridge Repository
2
Cambridge University Press
2
Max Planck Society: MPG.PuRe
2
Memorial University of Newfoundland: Research Repository
2
National Research Council Canada: NRC Publications Archive
2
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
2
PANGAEA - Data Publisher for Earth & Environmental Science
2
Texas State University: Digital Collections Repository
2
University College London: UCL Discovery
2
University of Bergen: Bergen Open Research Archive (BORA-UiB)
2
University of Copenhagen: Research
2
Xiamen University Institutional Repository
2
Zenodo
2
Aarhus University: Research
1
Aix-Marseille Université: HAL
1
Archives ouvertes de Paris-Saclay
1
Arctic Institute of North America
1
Australian National University: ANU Digital Collections
1
BioOne Online Journals
1
Canadian Science Publishing
1
DSpace@MIT (Massachusetts Institute of Technology)
1
Dartmouth Digital Commons (Dartmouth College)
1
Digital.CSIC (Spanish National Research Council)
1
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
1
HELDA – University of Helsinki Open Repository
1
Hereon Publications (Helmholtz-Zentrum)
1
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
1
Indian Academy of Sciences: Publication of Fellows
1
Institut national de la recherche scientifique, Québec: Espace INRS
1
Institut national des sciences de l'Univers: HAL-INSU
1
International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons
1
MDPI Open Access Publishing
1
MSpace at the University of Manitoba
1
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