Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
5,059
NOAA NCEI Environmental Data Archive (via DataONE)
1,658
Arctic Data Center (via DataONE)
962
Unknown
913
PANGAEA - Data Publisher for Earth & Environmental Science
757
Zenodo
691
Directory of Open Access Journals: DOAJ Articles
404
ScienceDirect (Elsevier - via Crossref)
374
USGS Science Data Catalog (via DataONE)
296
University of Washington, Seattle: Digital Collections
276
CyberLeninka (Scientific Electronic Library)
236
ScienceDirect (Elsevier)
232
Biodiversity Heritage Library (BHL)
224
University of Michigan: Digital Collections
203
Hathi Trust Digital Library
190
Springer Nature (via Crossref)
186
University of Alaska: ScholarWorks@UA
182
Wiley Online Library (via Crossref)
179
University of California: eScholarship
177
Defense Technical Information Center: DTIC Technical Reports database
164
Research Workspace (via DataONE)
159
Washington State University: WSU Libraries Digital Collections
143
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
126
PubMed Central (PMC)
124
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
123
HighWire Press (Stanford University)
120
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP)
116
International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons
112
ScholarsArchive@OSU (Oregon State University)
103
Canadian Science Publishing (via Crossref)
102
University of Calgary Journal Hosting
93
Knowledge Network for Biocomplexity (via DataONE)
82
Wiley Online Library
82
Frontiers: Figshare
70
NASA Technical Reports Server (NTRS)
66
Santa Clara University: SCU Digital Collections
63
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
61
Oxford University Press (via Crossref)
61
Cambridge University Press
57
Xiamen University Institutional Repository
55
MDPI Open Access Publishing
51
Copernicus Publications: E-Journals
50
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
47
Biological and Chemical Oceanography Data Management Office (BCO-DMO) (via DataONE)
46
RePEc (Research Papers in Economics)
45
Informa (via Crossref)
44
University of Washington, Seattle: ResearchWorks
42
National Institute of Polar Research Repository, Japan
40
Open Parks Network
40
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
39
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