Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
3,372
Unknown
2,206
Copernicus Publications: E-Journals
1,377
PubMed Central (PMC)
1,029
Defense Technical Information Center: DTIC Technical Reports database
867
HighWire Press (Stanford University)
409
MDPI Open Access Publishing
303
University of New Hampshire: Scholars Repository
298
Hathi Trust Digital Library
249
North Dakota State University (NDSU): Digital Horizons
178
ArXiv.org (Cornell University Library)
125
David Rumsey Historical Map Collection (Cartography Associates)
124
EPFL Infoscience (Ecole Polytechnique Fédérale Lausanne)
105
The University of Maine: DigitalCommons@UMaine
99
University of Michigan: Digital Collections
92
Érudit.org (Université Montréal)
83
University of Nebraska-Lincoln: DigitalCommons@UNL
65
DigiZeitschriften: The German digital journal archive (Göttingen University Library)
63
BioOne Online Journals
59
University of Colorado, Boulder: CU Scholar
51
CyberLeninka (Scientific Electronic Library)
46
University of Windsor, Ontario: Scholarship at UWindsor
46
IRD (Institute de recherche pour le développement): Horizon
43
University of South Florida St. Petersburg: Digital USFSP
40
University of the Pacific, McGeorge School of Law: Scholarly Commons
40
University of the Pacific: Scholarly Commons
40
norden (Nordic Council of Ministers): Publications (DiVA)
39
Digital Commons University of South Florida (USF)
36
Dartmouth Digital Commons (Dartmouth College)
34
Washington State University: WSU Libraries Digital Collections
34
University of Rhode Island: DigitalCommons@URI
33
OhioLINK: Electronic Theses and Dissertations Center
32
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
31
Michigan Technological University: Digital Commons @ Michigan Tech
29
APS Digital Library (American Philosophical Society)
27
Portland Public Library: Digital Commons
27
Bavarian Digital Repository (BDR - Bayerische Staatsbibliothek Munich, BSB)
26
LSU Digital Commons (Louisiana State University)
26
University of Massachusetts: ScholarWorks@UMass Amherst
22
University of Montana: ScholarWorks
21
Natural Environment Research Council: NERC Open Research Archive
20
Utah State University: DigitalCommons@USU
20
Arctic Portal Library
19
University of Florida: Digital Library Center
18
Brigham Young University (BYU): ScholarsArchive
17
The University of Utah: J. Willard Marriott Digital Library
17
American Museum of Natural History: AMNH scientific publications
16
Digital Repository of Scientific Institutes (RCIN)
13
English Heritage ViewFinder
13
Texas Tech University: TTU DSpace Repository
13
more ...