Content Provider
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Charles University CU Digital repository
107
IOP Publishing
101
University of Groningen research database
101
Vrije Universiteit Amsterdam (VU): Research Portal
100
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
99
NASA Technical Reports Server (NTRS)
98
University of Alberta: Era - Education and Research Archive
98
University of Nebraska-Lincoln: DigitalCommons@UNL
96
The University of Utah: J. Willard Marriott Digital Library
94
Northwest Institute of Plateau Biology: NWIPB OpenIR (Chinese Academy of Sciences)
93
Frontiers: Figshare
87
Knowledge Network for Biocomplexity (via DataONE)
85
JSTOR (via Crossref)
83
Jultika - University of Oulu repository
82
ORNL DAAC (via DataONE)
82
ScienceDirect (Elsevier)
82
Theses Canada/Thèses Canada (Library and Archives Canada)
80
Natural Resources Institute Finland: Jukuri
78
BioOne Online Journals
77
University of North Texas: UNT Digital Library
77
Natural Environment Research Council: NERC Open Research Archive
76
Oxford University Press
74
IOP Publishing (via Crossref)
71
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
70
National Institute of Polar Research Repository, Japan
69
Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto
68
TERN Australia (via DataONE)
68
NTNU Open Archive (Norwegian University of Science and Technology)
67
Arctic Institute of North America (via Crossref)
66
North Dakota State University (NDSU): Digital Horizons
65
Open Forest Data
60
Érudit.org (Université Montréal)
60
University of Potsdam: publish.UP
59
Biodiversity Heritage Library (BHL)
57
HighWire Press (Stanford University)
57
Norwegian Institute for Nature Research: Brage NINA
57
Springer Nature
57
Frontiers (Publisher)
54
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive
54
IMHE OpenIR (Institute of Mountain Hazards and Environment, Chinese Academy of Sciences)
53
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
53
Research Data Australia (Australian National Data Service - ANDS)
52
Iowa State University Library Digital Collections
50
Tomsk State University Research Library
50
IEEE Publications (via Crossref)
44
University of Alberta: Journal Hosting
44
ScholarsArchive@OSU (Oregon State University)
43
The Portal to Texas History (University of North Texas)
43
University of Stirling: Stirling Digital Research Repository
43
University of Toronto: Research Repository T-Space
43
more ...