Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
10
University of California: eScholarship
9
Defense Technical Information Center: DTIC Technical Reports database
5
ArXiv.org (Cornell University Library)
3
Cambridge University Press
3
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
3
The University of Maine: DigitalCommons@UMaine
3
Unknown
3
Chalmers University of Technology: Chalmers research
2
DESY Publication Database (PUBDB)
2
Directory of Open Access Journals: DOAJ Articles
2
David Rumsey Historical Map Collection (Cartography Associates)
1
North Dakota State University (NDSU): Digital Horizons
1
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
1
The University of Texas at Austin: Texas ScholarWorks
1
University of Canterbury, Christchurch: UC Research Repository
1
University of North Texas: UNT Digital Library
1
University of Otago: Research Archive (OUR Archive)
1
Università degli Studi di Genova: CINECA IRIS
1