Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
8,590
Research Data Australia (Australian National Data Service - ANDS)
307
Zenodo
218
David Rumsey Historical Map Collection (Cartography Associates)
170
Unknown
140
University of Canterbury, Christchurch: UC Research Repository
108
Directory of Open Access Journals: DOAJ Articles
75
Australian National University: ANU Digital Collections
72
Natural Environment Research Council: NERC Open Research Archive
69
National Library of Australia: Digital Collections
64
Cambridge University Press
63
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
47
The University of Waikato: Research Commons
39
eCite UTAS (University of Tasmania)
34
Magnolia press
33
The University of Queensland: UQ eSpace
33
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
32
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
31
Wiley Online Library (via Crossref)
31
PubMed Central (PMC)
29
University of Otago: Research Archive (OUR Archive)
29
PANGAEA - Data Publisher for Earth & Environmental Science
28
WikiBooks - Open-content textbooks
28
Copernicus Publications: E-Journals
24
Ohio State University (OSU): Knowledge Bank
24
Open Access Victoria University of Wellington / Te Herenga Waka
24
Wiley Online Library
24
University of Tasmania: UTas ePrints
23
HighWire Press (Stanford University)
22
The University of Adelaide: Digital Library
20
Université de Nantes: HAL-UNIV-NANTES
20
Informa (via Crossref)
18
Università degli Studi di Napoli "Parthenope": CINECA IRIS
18
Biodiversity Heritage Library (BHL)
17
Defense Technical Information Center: DTIC Technical Reports database
16
Victoria University of Wellington: ResearchArchive
16
Niedersächsisches Online-Archiv NOA
15
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
15
BioOne Online Journals
14
Digital.CSIC (Spanish National Research Council)
14
University of Michigan: Digital Collections
14
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
14
University of Wollongong, Australia: Research Online
14
ESS-DIVE: Deep Insight for Earth Science Data (via DataONE)
13
National Institute of Polar Research Repository, Japan
13
University of Auckland Research Repository - ResearchSpace
13
University of Washington, Seattle: Digital Collections
13
Institut national des sciences de l'Univers: HAL-INSU
12
NRC Digital Repository (National Research Council Canada)
12
Wellcome Trust, London: Wellcome Images
12
more ...