Content Provider
University of Washington, Seattle: Digital Collections
705
University of Michigan: Digital Collections
126
DataCite Metadata Store (German National Library of Science and Technology)
101
Washington State University: WSU Libraries Digital Collections
97
University of Lethbridge Digitized Collections
33
Oklahoma State University: Digital Collections @ OKSTATE Library
24
Zenodo
21
Unknown
17
University of British Columbia: cIRcle - UBC's Information Repository
14
Theses Canada/Thèses Canada (Library and Archives Canada)
13
University of Calgary Journal Hosting
13
The Library of Congress: American Memory
10
Arca (BC's Digital Treasures)
9
Cambridge University Press
8
Canadian Science Publishing (via Crossref)
8
University of Alaska: ScholarWorks@UA
8
ScienceDirect (Elsevier - via Crossref)
7
Georgia State University Library Digital Collections
6
The Seattle Public Library Special Collections Online
6
NOAA NCEI Environmental Data Archive (via DataONE)
5
The Gateway to Oklahoma History (University of North Texas Libraries)
5
University of Florida: Digital Library Center
5
Canadian Science Publishing
4
David Rumsey Historical Map Collection (Cartography Associates)
4
Directory of Open Access Journals: DOAJ Articles
4
Hathi Trust Digital Library
4
Knowledge Network for Biocomplexity (via DataONE)
4
Open Access Journal Hosting (University of British Columbia)
4
Oregon Digital (University of Oregon/Oregon State University)
4
uO Research (University of Ottawa - uOttawa)
4
Érudit.org (Université Montréal)
4
Dalhousie University: DalSpace Institutional Repository
3
Oxford University Press (via Crossref)
3
The University of Utah: J. Willard Marriott Digital Library
3
The University of Western Ontario: Scholarship@Western
3
University of the Pacific, McGeorge School of Law: Scholarly Commons
3
University of the Pacific: Scholarly Commons
3
VIURRSpace (Royal Roads University and Vancouver Island University)
3
Wiley Online Library (via Crossref)
3
York University Digital Library
3
APS Digital Library (American Philosophical Society)
2
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
2
Biodiversity Heritage Library (BHL)
2
Borealis
2
Gallica - bibliothèque numérique de la Bibliothèque nationale de France (BnF)
2
James Cook University, Australia: ResearchOnline@JCU
2
MSpace at the University of Manitoba
2
McGill University: eScholarship@McGill
2
National Research Council Canada: NRC Publications Archive
2
North Dakota State University (NDSU): Digital Horizons
2
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