Content Provider
ScienceDirect (Elsevier - via Crossref)
6,566
PANGAEA - Data Publisher for Earth & Environmental Science
3,415
Cambridge University Press
2,811
Frontiers: Figshare
2,384
ScienceDirect (Elsevier)
2,220
Directory of Open Access Journals: DOAJ Articles
1,923
DataCite Metadata Store (German National Library of Science and Technology)
1,663
Frontiers (Publisher)
1,561
Springer Nature (via Crossref)
1,305
Arctic Data Center (via DataONE)
1,090
eCite UTAS (University of Tasmania)
993
Oxford University Press (via Crossref)
987
Oxford University Press
936
Wiley Online Library
932
Unknown
831
Wiley Online Library (via Crossref)
744
University of California: eScholarship
621
Informa (via Crossref)
457
Stockholm University Press (via Crossref)
296
Biodiversity Heritage Library (BHL)
276
Old Dominion University: ODU Digital Commons
265
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR
199
Informa
154
NASA Technical Reports Server (NTRS)
148
Plymouth Marine Science Electronic Archive (PlyMSEA - Plymouth Marine Laboratory, PML)
148
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
145
University of the Highlands and Islands: Research Database of UHI
138
University of California Press (via Crossref)
125
W&M ScholarWorks
117
University of California Press
114
International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons
109
David Rumsey Historical Map Collection (Cartography Associates)
104
Columbia University: Academic Commons
93
Brill (via Crossref)
91
Stockholm University Press
86
Hathi Trust Digital Library
82
DRO - Deakin Research Online
75
Utrecht University Repository
75
The Royal Society: Figshare
70
Naval Postgraduate School: Calhoun
67
Cambridge University Press (via Crossref)
66
KovsieScholar Repository (University of the Free State - UFS UV)
65
SMHI (Swedish Meteorological and Hydrological Institute): Vetenskapliga Publikationer (DiVA)
61
The University of Maine: DigitalCommons@UMaine
57
Australian National University: ANU Digital Collections
55
Chalmers University of Technology: Chalmers research
54
Florida State University Digital Library (FSUDL)
52
Uppsala University: Publications (DiVA)
52
University of Cape Town: OpenUCT
50
Florida State University: DigiNole Commons
48
more ...