Content Provider
University of Lethbridge Digitized Collections
88
DataCite Metadata Store (German National Library of Science and Technology)
51
Washington State University: WSU Libraries Digital Collections
37
Oklahoma State University: Digital Collections @ OKSTATE Library
17
The University of Utah: J. Willard Marriott Digital Library
9
University of the Pacific, McGeorge School of Law: Scholarly Commons
9
University of the Pacific: Scholarly Commons
9
University of Calgary Journal Hosting
7
Unknown
5
Wiley Online Library (via Crossref)
5
Directory of Open Access Journals: DOAJ Articles
4
ScholarsArchive@OSU (Oregon State University)
4
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
3
Cambridge University Press
3
Cambridge University Press (via Crossref)
3
Hathi Trust Digital Library
3
University of Michigan: Digital Collections
3
University of Washington, Seattle: Digital Collections
3
University of Washington: ResearchWorks Journal Hosting
3
Arca (BC's Digital Treasures)
2
British Library Research Repository
2
Canadian Science Publishing (via Crossref)
2
Defense Technical Information Center: DTIC Technical Reports database
2
Memorial University of Newfoundland: Research Repository
2
North Dakota State University (NDSU): Digital Horizons
2
Open Access Journal Hosting (University of British Columbia)
2
PubMed Central (PMC)
2
Southern Oregon University Digital Collections
2
The Library of Congress: American Memory
2
The Portal to Texas History (University of North Texas)
2
University of British Columbia: cIRcle - UBC's Information Repository
2
University of California: eScholarship
2
University of Victoria (Canada): UVicDSpace
2
University of Wyoming: Digital Repository
2
University of Wyoming: UW Libraries Digital Repository (Digital UW)
2
Université du Québec à Chicoutimi (UQAC): Constellation
2
Wiley Online Library
2
Apollo - University of Cambridge Repository
1
Archive Ouverte de l'Université Rennes (HAL)
1
Athabasca University Digitization Portal
1
Caltech Authors (California Institute of Technology)
1
Canadian Science Publishing
1
City University of New York: CUNY Academic Works
1
Colby College: DigitalCommons@Colby
1
DR-NTU (Digital Repository at Nanyang Technological University, Singapore)
1
Digital Commons @ CSUMB (California State University, Monterey Bay)
1
Ghent University Academic Bibliography
1
HighWire Press (Stanford University)
1
Hunter Library Digital Collections (Western Carolina University)
1
Institut national des sciences de l'Univers: HAL-INSU
1
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