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12
Directory of Open Access Journals: DOAJ Articles
4
Utrecht University Repository
3
Copernicus Publications: E-Journals
2
Niedersächsisches Online-Archiv NOA
2
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
1
Ice and Snow (E-Journal)
1
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
1
PLOS
1
PubMed Central (PMC)
1
University of Liège: ORBi (Open Repository and Bibliography)
1
Vrije Universiteit Amsterdam (VU): Research Portal
1