Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
48,443
Unknown
4,499
NOAA NCEI Environmental Data Archive (via DataONE)
3,629
Directory of Open Access Journals: DOAJ Articles
3,390
University of Washington, Seattle: Digital Collections
3,037
Washington State University: WSU Libraries Digital Collections
2,296
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
1,387
PubMed Central (PMC)
1,281
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
956
PANGAEA - Data Publisher for Earth & Environmental Science
926
David Rumsey Historical Map Collection (Cartography Associates)
897
Wiley Online Library
880
Arctic Data Center (via DataONE)
874
Springer Nature (via Crossref)
835
Université de Nantes: HAL-UNIV-NANTES
820
ScienceDirect (Elsevier - via Crossref)
803
Copernicus Publications: E-Journals
701
USGS Science Data Catalog (via DataONE)
679
Defense Technical Information Center: DTIC Technical Reports database
651
Institut national des sciences de l'Univers: HAL-INSU
588
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
586
University of California: eScholarship
574
Natural Environment Research Council: NERC Open Research Archive
570
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR
493
Frontiers: Figshare
463
Niedersächsisches Online-Archiv NOA
463
LeibnizOpen (The Leibniz Association)
439
Research Workspace (via DataONE)
423
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
423
MDPI Open Access Publishing
404
CyberLeninka (Scientific Electronic Library)
403
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
380
University of Southampton: e-Prints Soton
366
The Seattle Public Library Special Collections Online
339
ScienceDirect (Elsevier)
334
eCite UTAS (University of Tasmania)
333
HighWire Press (Stanford University)
327
Digital.CSIC (Spanish National Research Council)
323
Biological and Chemical Oceanography Data Management Office (BCO-DMO) (via DataONE)
299
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP)
277
Cambridge University Press
271
Australian National University: ANU Digital Collections
269
Dryad Digital Repository (Duke University)
264
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
260
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
249
Hathi Trust Digital Library
248
University of Alaska: ScholarWorks@UA
247
Université de Bretagne Occidentale: HAL
247
Research Data Australia (Australian National Data Service - ANDS)
245
Open Parks Network
244
more ...