Content Provider
Unknown
308
DataCite Metadata Store (German National Library of Science and Technology)
249
Washington State University: WSU Libraries Digital Collections
130
Directory of Open Access Journals: DOAJ Articles
129
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
91
International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons
84
PANGAEA - Data Publisher for Earth & Environmental Science
79
Wiley Online Library (via Crossref)
63
PubMed Central (PMC)
54
Defense Technical Information Center: DTIC Technical Reports database
50
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
46
University of Alaska: ScholarWorks@UA
46
Wiley Online Library
45
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP)
42
ScholarsArchive@OSU (Oregon State University)
34
Canadian Science Publishing (via Crossref)
33
ScienceDirect (Elsevier - via Crossref)
33
ScienceDirect (Elsevier)
32
HighWire Press (Stanford University)
28
Springer Nature (via Crossref)
28
Hathi Trust Digital Library
27
MDPI Open Access Publishing
21
University of California: eScholarship
21
Canadian Science Publishing
20
Biodiversity Heritage Library (BHL)
19
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
19
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR
18
Copernicus Publications: E-Journals
17
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
16
Oxford University Press
16
Magnolia press
15
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
13
National Institute of Polar Research Repository, Japan
13
Niedersächsisches Online-Archiv NOA
13
Université de Nantes: HAL-UNIV-NANTES
13
Natural Environment Research Council: NERC Open Research Archive
12
University of Calgary Journal Hosting
12
Cambridge University Press
11
PLOS
11
University of Washington, Seattle: ResearchWorks
11
Xiamen University Institutional Repository
11
Cambridge University Press (via Crossref)
8
Institut national des sciences de l'Univers: HAL-INSU
8
The Hong Kong University of Science and Technology: HKUST Institutional Repository
8
University of North Texas: UNT Digital Library
8
eCite UTAS (University of Tasmania)
8
Institute for Marine Research: Brage IMR
7
Kyoto University Research Information Repository (KURENAI)
7
University of Tasmania: UTas ePrints
7
Arctic Portal Library
6
more ...