Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
27,420
NOAA NCEI Environmental Data Archive (via DataONE)
49
Hunter Library Digital Collections (Western Carolina University)
30
University of North Carolina: UNC Digital Collections
8
Gulf of Mexico Research Initiative (via DataONE)
6
Defense Technical Information Center: DTIC Technical Reports database
5
HighWire Press (Stanford University)
4
Directory of Open Access Journals: DOAJ Articles
3
Environmental Protection Agency (EPA): Science Inventory
3
Jultika - University of Oulu repository
3
Unknown
3
Dove Medical Press
2
Molloy College: Digital Commons @ Molloy
2
Oxford University Press (via Crossref)
2
The Portal to Texas History (University of North Texas)
2
The University of Utah: J. Willard Marriott Digital Library
2
Universidade Federal de São Paulo (UNIFESP): Repositório Institucional
2
University of Pittsburgh: Archive of European Integration (AEI)
2
Érudit.org (Université Montréal)
2
Arctic Data Center (via DataONE)
1
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
1
Cambridge University Press
1
Carolina Digital Repository (UNC - University of North Carolina)
1
De Gruyter (via Crossref)
1
Georgia State University Library Digital Collections
1
Halifax Public Libraries Digital Archives
1
Knowledge Network for Biocomplexity (via DataONE)
1
NASA Technical Reports Server (NTRS)
1
Natural Environment Research Council: NERC Open Research Archive
1
Nomos
1
North Dakota State University (NDSU): Digital Horizons
1
PALNI Digital Library Collections (Private Academic Library Network of Indiana)
1
Research Data Australia (Australian National Data Service - ANDS)
1
Saint Louis University Libraries Digital Collections
1
The University of Alabama at Birmingham: UAB Libraries' Digital Collections
1
The University of Dublin, Trinity College: TARA (Trinity's Access to Research Archive)
1
UNC Dataverse
1
University of Alaska: ScholarWorks@UA
1
University of Alberta: Journal Hosting
1
University of Leicester: Leicester Research Archive (LRA)
1
University of Nebraska-Lincoln: DigitalCommons@UNL
1
University of Otago: Research Archive (OUR Archive)
1
University of Southampton: e-Prints Soton
1
Utah State University: DigitalCommons@USU
1
Wiley Online Library
1
Wiley Online Library (via Crossref)
1