Content Provider
Ohio State University (OSU): Knowledge Bank
3,236
DataCite Metadata Store (German National Library of Science and Technology)
407
Unknown
98
Cambridge University Press
91
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
76
PANGAEA - Data Publisher for Earth & Environmental Science
64
Defense Technical Information Center: DTIC Technical Reports database
55
Natural Environment Research Council: NERC Open Research Archive
47
Directory of Open Access Journals: DOAJ Articles
32
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
30
NOAA NCEI Environmental Data Archive (via DataONE)
28
University of Washington, Seattle: Digital Collections
27
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
25
IEDA: US Antarctic Program Data Center (via DataONE)
24
ScienceDirect (Elsevier - via Crossref)
24
Australian National University: ANU Digital Collections
23
Hunter Library Digital Collections (Western Carolina University)
22
Washington State University: WSU Libraries Digital Collections
22
Geological Society of London: Figshare
21
BORIS (Bern Open Repository and Information System, University of Bern)
19
Texas Tech University: TTU DSpace Repository
19
Université de Nantes: HAL-UNIV-NANTES
19
Central Washington University: ScholarWorks
17
The University of Maine: DigitalCommons@UMaine
17
The Gateway to Oklahoma History (University of North Texas Libraries)
16
Zenodo
15
National Institute of Polar Research Repository, Japan
14
Wiley Online Library (via Crossref)
14
Copernicus Publications: E-Journals
13
Hathi Trust Digital Library
13
HighWire Press (Stanford University)
13
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
13
The University of Kansas: KU ScholarWorks
13
Columbia University: Academic Commons
12
Illinois State Library: Illinois Digital Archives
12
Informa (via Crossref)
11
Springer Nature (via Crossref)
11
Wichita State University: SOAR (Shocker Open Access Repository)
11
Université Grenoble Alpes: HAL
10
IEDA: Marine-Geo Digital Library (via DataONE)
9
Institut national des sciences de l'Univers: HAL-INSU
9
JSTOR (via Crossref)
9
Niedersächsisches Online-Archiv NOA
9
University of Michigan: Digital Collections
9
University of Tasmania: UTas ePrints
9
eCite UTAS (University of Tasmania)
9
Caltech Authors (California Institute of Technology)
8
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia)
8
Macquarie University Research Portal
8
NASA Technical Reports Server (NTRS)
8
more ...