Content Provider
The University of Utah: J. Willard Marriott Digital Library
21
DataCite Metadata Store (German National Library of Science and Technology)
17
University of Nebraska-Lincoln: DigitalCommons@UNL
5
Hunter Library Digital Collections (Western Carolina University)
4
University of Calgary Journal Hosting
3
Arctic Institute of North America (via Crossref)
2
Defense Technical Information Center: DTIC Technical Reports database
2
North Dakota State University (NDSU): Digital Horizons
2
Ohio State University (OSU): Knowledge Bank
2
UTSA Digital Collections (The University of Texas at San Antonio)
2
Cambridge University Press
1
JYX - Jyväskylä University Digital Archive
1
The Gateway to Oklahoma History (University of North Texas Libraries)
1
University of Illinois at Urbana-Champaign: IDEALS (Illinois Digital Environment for Access to Learning and Scholarship)
1
Unknown
1
Wiley Online Library (via Crossref)
1
Zenodo
1