Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
26,532
Arctic Data Center (via DataONE)
888
University of Lethbridge Digitized Collections
133
UTSA Digital Collections (The University of Texas at San Antonio)
99
The University of Utah: J. Willard Marriott Digital Library
67
ESS-DIVE: Deep Insight for Earth Science Data (via DataONE)
60
Stephen F. Austin State University, Texas: Scholar Works @ SFA
48
North Dakota State University (NDSU): Digital Horizons
33
The University of Texas at Austin: Texas ScholarWorks
27
Hunter Library Digital Collections (Western Carolina University)
18
David Rumsey Historical Map Collection (Cartography Associates)
17
IEDA: Marine-Geo Digital Library (via DataONE)
16
The University of Adelaide: Digital Library
16
Zenodo
16
Unknown
13
WikiBooks - Open-content textbooks
10
Cambridge University Press
9
Hathi Trust Digital Library
9
NOAA NCEI Environmental Data Archive (via DataONE)
9
Ohio State University (OSU): Knowledge Bank
9
University of Washington, Seattle: Digital Collections
9
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
8
Oklahoma State University: Digital Collections @ OKSTATE Library
8
University of Nebraska-Lincoln: DigitalCommons@UNL
8
Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen)
7
Directory of Open Access Journals: DOAJ Articles
7
PALNI Digital Library Collections (Private Academic Library Network of Indiana)
7
Wiley Online Library (via Crossref)
7
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
6
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
6
The University of Alabama at Birmingham: UAB Libraries' Digital Collections
6
Digital.CSIC (Spanish National Research Council)
5
Gulf of Alaska Data Portal (via DataONE)
5
University of the Pacific, McGeorge School of Law: Scholarly Commons
5
University of the Pacific: Scholarly Commons
5
Université de Nantes: HAL-UNIV-NANTES
5
Oxford University Press (via Crossref)
4
University of Calgary Journal Hosting
4
Wiley Online Library
4
Apollo - University of Cambridge Repository
3
Arctic Institute of North America (via Crossref)
3
DSpace@MIT (Massachusetts Institute of Technology)
3
Loyola University Chicago Digital Special Collections
3
Naval Postgraduate School: Calhoun
3
Northern Territory Government Health Library Services ePublications
3
PubMed Central (PMC)
3
Research Data Australia (Australian National Data Service - ANDS)
3
University of Alaska: ScholarWorks@UA
3
University of California: eScholarship
3
Washington State University: WSU Libraries Digital Collections
3
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