Content Provider
LeibnizOpen (The Leibniz Association)
19
DataCite Metadata Store (German National Library of Science and Technology)
8
Unknown
7
Copernicus Publications: E-Journals
5
Australian Nuclear Science and Technology Organisation: ANSTO Publications Online
4
Directory of Open Access Journals: DOAJ Articles
4
The University of Maine: DigitalCommons@UMaine
3
IEDA: US Antarctic Program Data Center (via DataONE)
2
LSU Digital Commons (Louisiana State University)
2
PubMed Central (PMC)
2
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
2
Caltech Authors (California Institute of Technology)
1
Cambridge University Press
1
Central Washington University: ScholarWorks
1
Columbia University: Academic Commons
1
Defense Technical Information Center: DTIC Technical Reports database
1
Freie Universität Berlin: Refubium (FU Berlin)
1
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
1
Montana State University (MSU): ScholarWorks
1
Natural Environment Research Council: NERC Open Research Archive
1
Northern Illinois University (NIU): Huskie Commons Repository
1
PANGAEA - Data Publisher for Earth & Environmental Science
1
Portland State University: PDXScholar
1
Rice University: Digital Scholarship Archive
1
The University of Auckland: Figshare
1
The University of Kansas: KU ScholarWorks
1
University of California: eScholarship
1
University of Nebraska-Lincoln: DigitalCommons@UNL
1
University of Otago: Research Archive (OUR Archive)
1
Università degli Studi di Siena: USiena air
1