Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
16,209
Unknown
151
University of Lethbridge Digitized Collections
54
Directory of Open Access Journals: DOAJ Articles
40
RePEc (Research Papers in Economics)
34
da|ra - Registration agency for social and economic data
26
CESSDA DC Data Catalogue (Consortium of European Social Science Data Archives)
20
PubMed Central (PMC)
20
WHO (World Health Organization): Institutional Repository for Information Sharing (IRIS)
18
ESS-DIVE: Deep Insight for Earth Science Data (via DataONE)
15
UNESDOC - UNESCO Digital Library
14
Research Data Australia (Australian National Data Service - ANDS)
12
University of British Columbia: cIRcle - UBC's Information Repository
12
WikiBooks - Open-content textbooks
12
VADS (Visual Arts Data Service - University for the Creative Arts, Farnham)
11
Cambridge University Press
10
SFU Digitized Collections (Simon Fraser University)
10
University of Otago: Research Archive (OUR Archive)
10
Cambridge University Press (via Crossref)
9
Hathi Trust Digital Library
9
Knowledge Network for Biocomplexity (via DataONE)
9
Digital.CSIC (Spanish National Research Council)
8
MDPI Open Access Publishing
8
University of North Texas: UNT Digital Library
8
Alia - Finnish Social Science Data Archive
7
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
7
Queensland University of Technology: QUT ePrints
7
The University of Queensland: UQ eSpace
7
The University of Utah: J. Willard Marriott Digital Library
7
University of Washington, Seattle: Digital Collections
7
University of the Pacific, McGeorge School of Law: Scholarly Commons
7
University of the Pacific: Scholarly Commons
7
Oxford University Press (via Crossref)
6
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
6
The University of Adelaide: Digital Library
6
Universidade Federal de São Paulo (UNIFESP): Repositório Institucional
6
University of Leicester: Leicester Research Archive (LRA)
6
Defense Technical Information Center: DTIC Technical Reports database
5
Dryad Digital Repository (Duke University)
5
Griffith University: Griffith Research Online
5
HighWire Press (Stanford University)
5
Lincoln University (New Zealand): Lincoln U Research Archive
5
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
5
The University of Waikato: Research Commons
5
USGS Science Data Catalog (via DataONE)
5
University of Southern Queensland: USQ ePrints
5
Wiley Online Library
5
Allard Research Commons (Peter A. Allard School of Law)
4
DIAL@USL-B (Université Saint-Louis, Bruxelles)
4
DataCite
4
more ...