Content Provider
USGS Science Data Catalog (via DataONE)
2,262
PANGAEA - Data Publisher for Earth & Environmental Science
868
ScienceDirect (Elsevier - via Crossref)
420
ScienceDirect (Elsevier)
297
DataCite Metadata Store (German National Library of Science and Technology)
217
University of Tromsø: Munin Open Research Archive
177
DataCite
134
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
128
Defense Technical Information Center: DTIC Technical Reports database
119
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
118
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
92
Natural Environment Research Council: NERC Open Research Archive
84
NOAA NCEI Environmental Data Archive (via DataONE)
82
Institut national des sciences de l'Univers: HAL-INSU
73
Université de Nantes: HAL-UNIV-NANTES
70
Unknown
63
Digital.CSIC (Spanish National Research Council)
44
University of Southampton: e-Prints Soton
39
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
34
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia)
33
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
31
Ghent University Academic Bibliography
30
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
27
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
26
Directory of Open Access Journals: DOAJ Articles
23
Archives ouvertes de Paris-Saclay
22
HAL Sorbonne Université
22
LeibnizOpen (The Leibniz Association)
22
Durham University: Durham Research Online
21
Springer Nature (via Crossref)
20
Wiley Online Library
18
University of Bergen: Bergen Open Research Archive (BORA-UiB)
17
Research Data Australia (Australian National Data Service - ANDS)
15
UNESDOC - UNESCO Digital Library
15
Université de Paris: Portail HAL
15
LSU Digital Commons (Louisiana State University)
14
Norsk Polarinstitutt: Brage NP
14
Norwegian Polar Institute: Brage NP
14
University of Glasgow: Enlighten - Publications
14
Apollo - University of Cambridge Repository
13
Digital Commons University of South Florida (USF)
13
Instituto Español de Oceanografía: e-IEO
13
University of Michigan: Deep Blue
13
University of South Florida St. Petersburg: Digital USFSP
13
Zenodo
13
Cambridge University Press
12
Rice University: Digital Scholarship Archive
12
University of New Hampshire: Scholars Repository
12
Aarhus University: Research
11
Portail HAL-ANR (Agence Nationale de la Recherche)
11
more ...