Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
853
Unknown
781
PANGAEA - Data Publisher for Earth & Environmental Science
757
ScienceDirect (Elsevier - via Crossref)
364
Directory of Open Access Journals: DOAJ Articles
306
ScienceDirect (Elsevier)
231
Hathi Trust Digital Library
189
Biodiversity Heritage Library (BHL)
188
Wiley Online Library (via Crossref)
175
Springer Nature (via Crossref)
165
Defense Technical Information Center: DTIC Technical Reports database
164
Washington State University: WSU Libraries Digital Collections
141
University of Alaska: ScholarWorks@UA
133
PubMed Central (PMC)
124
HighWire Press (Stanford University)
120
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
120
International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons
112
Canadian Science Publishing (via Crossref)
100
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP)
98
University of Calgary Journal Hosting
93
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
86
ScholarsArchive@OSU (Oregon State University)
81
Wiley Online Library
76
University of California: eScholarship
64
Cambridge University Press
55
MDPI Open Access Publishing
51
Copernicus Publications: E-Journals
50
National Institute of Polar Research Repository, Japan
40
Open Parks Network
40
Informa (via Crossref)
39
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
38
Niedersächsisches Online-Archiv NOA
37
Oxford University Press (via Crossref)
35
University of Michigan: Digital Collections
33
Magnolia press
28
Canadian Science Publishing
27
Université de Nantes: HAL-UNIV-NANTES
27
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
27
University of Lethbridge Digitized Collections
26
Xiamen University Institutional Repository
26
Natural Environment Research Council: NERC Open Research Archive
22
Arctic Portal Library
21
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR
21
Oxford University Press
21
eCite UTAS (University of Tasmania)
21
LeibnizOpen (The Leibniz Association)
19
University of Washington, Seattle: Digital Collections
19
University of Washington, Seattle: ResearchWorks
19
University of Southampton: e-Prints Soton
18
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
17
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