Content Provider
Arctic Data Center (via DataONE)
579
DataCite Metadata Store (German National Library of Science and Technology)
569
Unknown
450
Directory of Open Access Journals: DOAJ Articles
271
PANGAEA - Data Publisher for Earth & Environmental Science
266
MDPI Open Access Publishing
134
NASA Technical Reports Server (NTRS)
126
DataCite
71
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
70
Université de Nantes: HAL-UNIV-NANTES
57
Defense Technical Information Center: DTIC Technical Reports database
48
LeibnizOpen (The Leibniz Association)
40
University of Calgary Journal Hosting
33
Université d'Avignon et des Pays de Vaucluse: HAL
31
HAL Université Côte d'Azur
29
Aix-Marseille Université: HAL
28
Queen's University, Ontario: QSpace
25
University of California: eScholarship
22
Norwegian Polar Data Centre
21
Institut national des sciences de l'Univers: HAL-INSU
18
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen)
16
Theses Canada/Thèses Canada (Library and Archives Canada)
15
University of Tromsø: Munin Open Research Archive
15
Chalmers University of Technology: Chalmers research
14
MSpace at the University of Manitoba
14
International Arctic Research Center (IARC) Data Archive (via DataONE)
13
HAL Sorbonne Université
12
Research Workspace (via DataONE)
12
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
12
University of North Texas: UNT Digital Library
12
PRISM - University of Calgary Digital Repository
11
Plymouth Marine Science Electronic Archive (PlyMSEA - Plymouth Marine Laboratory, PML)
11
University of Colorado, Boulder: CU Scholar
11
Carolina Digital Repository (UNC - University of North Carolina)
10
Clark University: Clark Digital Commons
10
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR
10
JPL Technical Report Server
10
University of Alaska: ScholarWorks@UA
10
University of Montana: ScholarWorks
10
University of Waterloo, Canada: Institutional Repository
10
Apollo - University of Cambridge Repository
9
Dryad Digital Repository (Duke University)
9
HELDA – University of Helsinki Open Repository
9
Michigan Technological University: Digital Commons @ Michigan Tech
9
University College London: UCL Discovery
9
University of Maryland: Digital Repository (DRUM)
9
University of Victoria (Canada): UVicDSpace
9
Zenodo
9
uO Research (University of Ottawa - uOttawa)
9
Aarhus University: Research
8
more ...