Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
3,062
Unknown
2,206
Copernicus Publications: E-Journals
1,340
PubMed Central (PMC)
1,029
Defense Technical Information Center: DTIC Technical Reports database
867
HighWire Press (Stanford University)
410
MDPI Open Access Publishing
303
Hathi Trust Digital Library
292
University of New Hampshire: Scholars Repository
283
North Dakota State University (NDSU): Digital Horizons
178
ArXiv.org (Cornell University Library)
125
EPFL Infoscience (Ecole Polytechnique Fédérale Lausanne)
105
University of Michigan: Digital Collections
92
Érudit.org (Université Montréal)
70
DigiZeitschriften: The German digital journal archive (Göttingen University Library)
63
BioOne Online Journals
59
University of Nebraska-Lincoln: DigitalCommons@UNL
58
University of Colorado, Boulder: CU Scholar
51
University of Windsor, Ontario: Scholarship at UWindsor
50
CyberLeninka (Scientific Electronic Library)
46
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
Digital Commons University of South Florida (USF)
37
The University of Maine: DigitalCommons@UMaine
37
Dartmouth Digital Commons (Dartmouth College)
34
DataCite
34
Washington State University: WSU Libraries Digital Collections
34
OhioLINK: Electronic Theses and Dissertations Center
32
norden (Nordic Council of Ministers): Publications (DiVA)
32
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
31
APS Digital Library (American Philosophical Society)
27
The Online Books Page (Penn Libraries, University of Pennsylvania)
27
LSU Digital Commons (Louisiana State University)
26
Michigan Technological University: Digital Commons @ Michigan Tech
26
David Rumsey Historical Map Collection (Cartography Associates)
25
Portland Public Library: Digital Commons
24
University of Massachusetts: ScholarWorks@UMass Amherst
22
University of Rhode Island: DigitalCommons@URI
22
University of Montana: ScholarWorks
21
Natural Environment Research Council: NERC Open Research Archive
20
Utah State University: DigitalCommons@USU
20
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
UQAM - Université du Québec à Montréal: archipel
13
more ...