Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
17,987
PANGAEA - Data Publisher for Earth & Environmental Science
9,837
Arctic Data Center (via DataONE)
2,745
Unknown
2,116
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
1,719
NOAA NCEI Environmental Data Archive (via DataONE)
1,527
Directory of Open Access Journals: DOAJ Articles
1,422
David Rumsey Historical Map Collection (Cartography Associates)
1,281
Defense Technical Information Center: DTIC Technical Reports database
1,048
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
661
ScienceDirect (Elsevier - via Crossref)
607
Copernicus Publications: E-Journals
582
Zenodo
571
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
512
Springer Nature (via Crossref)
449
Niedersächsisches Online-Archiv NOA
410
Institut national des sciences de l'Univers: HAL-INSU
395
LeibnizOpen (The Leibniz Association)
395
PubMed Central (PMC)
332
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
324
Université de Nantes: HAL-UNIV-NANTES
312
Frontiers: Figshare
286
University of Tromsø: Munin Open Research Archive
273
HAL Sorbonne Université
241
Wiley Online Library
214
Digital.CSIC (Spanish National Research Council)
206
Natural Environment Research Council: NERC Open Research Archive
198
MDPI Open Access Publishing
192
Research Workspace (via DataONE)
181
University of Southampton: e-Prints Soton
181
ScienceDirect (Elsevier)
169
Cambridge University Press
168
Max Planck Society: MPG.PuRe
164
Frontiers (Publisher)
163
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
160
Technical University of Denmark: DTU Orbit
155
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
154
Biodiversity Heritage Library (BHL)
149
Aarhus University: Research
148
University of Bergen: Bergen Open Research Archive (BORA-UiB)
146
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
143
Biological and Chemical Oceanography Data Management Office (BCO-DMO) (via DataONE)
140
University of Calgary Journal Hosting
138
Naval Postgraduate School: Calhoun
132
Archives ouvertes de Paris-Saclay
130
Wiley Online Library (via Crossref)
127
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
123
National Institute of Polar Research Repository, Japan
121
USGS Science Data Catalog (via DataONE)
115
University of California: eScholarship
111
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