Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
61
University of Calgary Journal Hosting
16
Washington State University: WSU Libraries Digital Collections
14
Directory of Open Access Journals: DOAJ Articles
13
University of the Pacific, McGeorge School of Law: Scholarly Commons
13
University of the Pacific: Scholarly Commons
13
Arctic Data Center (via DataONE)
12
Knowledge Network for Biocomplexity (via DataONE)
12
USGS Science Data Catalog (via DataONE)
11
Unknown
11
Cambridge University Press
8
University of Washington, Seattle: Digital Collections
8
Copernicus Publications: E-Journals
7
Zenodo
7
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP)
6
Canadian Science Publishing (via Crossref)
5
Niedersächsisches Online-Archiv NOA
5
Canadian Science Publishing
3
Hunter Library Digital Collections (Western Carolina University)
3
University of Alaska: ScholarWorks@UA
3
University of Michigan: Digital Collections
3
University of Saskatchewan: eCommons@USASK
3
University of Waterloo, Canada: Institutional Repository
3
Caltech Authors (California Institute of Technology)
2
Connecticut Digital Archive
2
Defense Technical Information Center: DTIC Technical Reports database
2
MDPI Open Access Publishing
2
North Dakota State University (NDSU): Digital Horizons
2
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
2
University of Bristol: Bristol Research
2
University of Lethbridge Digitized Collections
2
University of San Diego: Digital@USanDiego
2
University of the Pacific: Holt-Atherton Special Collections
2
Uppsala University: Publications (DiVA)
2
uO Research (University of Ottawa - uOttawa)
2
ARPI - Archivio della Ricerca dell'Università di Pisa
1
Akademicka Platforma Czasopism
1
Akademicka Platforma Czasopism (APCZ)
1
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
1
Arizona Memory Project (Arizona State Library, Archives and Public Records)
1
Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen)
1
De Gruyter (via Crossref)
1
Durham University: Durham Research Online
1
Ghent University Academic Bibliography
1
HELDA – University of Helsinki Open Repository
1
IEDA: EarthChem Library (via DataONE)
1
NASA Technical Reports Server (NTRS)
1
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
1
PRISM - University of Calgary Digital Repository
1
Sciendo (de Gruyter - via CrossRef)
1
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