Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
736
DataCite
726
Unknown
720
Hathi Trust Digital Library
258
CyberLeninka (Scientific Electronic Library)
236
Defense Technical Information Center: DTIC Technical Reports database
164
Washington State University: WSU Libraries Digital Collections
141
PubMed Central (PMC)
124
HighWire Press (Stanford University)
120
Copernicus Publications: E-Journals
56
MDPI Open Access Publishing
51
Open Parks Network
40
University of Nebraska-Lincoln: DigitalCommons@UNL
35
University of Michigan: Digital Collections
33
University of Rhode Island: DigitalCommons@URI
27
LSU Digital Commons (Louisiana State University)
24
BioOne Online Journals
15
Clark University: Clark Digital Commons
14
University of New Hampshire: Scholars Repository
14
University of Florida: Digital Library Center
12
University of Oklahoma, College of Law: Digital Commons
11
University of the Pacific, McGeorge School of Law: Scholarly Commons
11
University of the Pacific: Scholarly Commons
11
ArXiv.org (Cornell University Library)
8
Digital Repository @ Iowa State University
8
AgEcon Search - Research in Agricultural & Applied Economics
7
San José State University: SJSU ScholarWorks
7
The University of Southern Mississippi: The Aquila Digital Community
7
University of San Diego: Digital@USanDiego
7
Digital Commons @ CSUMB (California State University, Monterey Bay)
6
Institute of Volcanology and Seismology, Petropavlovsk-Kamchatsky: IVS FEB RAS Repository
6
University of Massachusetts: ScholarWorks@UMass Amherst
6
Utah State University: DigitalCommons@USU
6
Michigan Technological University: Digital Commons @ Michigan Tech
5
American Museum of Natural History: AMNH scientific publications
4
Digital Commons University of South Florida (USF)
4
IRD (Institute de recherche pour le développement): Horizon
4
UW Law Digital Commons (University of Washington)
4
W&M ScholarWorks
4
Western Washington University: CEDAR (Contributing to Education through Digital Access to Research)
4
Dalhousie University: DalSpace Institutional Repository
3
Digital Collections of Colorado (Colorado State University)
3
Digital Repository of Scientific Institutes (RCIN)
3
Florida State University Digital Library (FSUDL)
3
Florida State University: DigiNole Commons
3
Mountain Scholar (Digital Collections of Colorado and Wyoming)
3
Southern Illinois University Carbondale: OpenSUIC
3
Syracuse University Research Facility And Collaborative Environment (SUrface)
3
The University of Maine: DigitalCommons@UMaine
3
University of Maine, School of Law: Digital Commons
3
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