Content Provider
AU Digital Research Archive (American University)
1,434
University of the Pacific, McGeorge School of Law: Scholarly Commons
798
University of the Pacific: Scholarly Commons
798
Biodiversity Heritage Library (BHL)
583
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive
533
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
417
DataCite Metadata Store (German National Library of Science and Technology)
301
Directory of Open Access Journals: DOAJ Articles
187
BORIS (Bern Open Repository and Information System, University of Bern)
135
Project Gutenberg (PG)
132
Unknown
119
Hathi Trust Digital Library
109
The Online Books Page (Penn Libraries, University of Pennsylvania)
85
The University of Utah: J. Willard Marriott Digital Library
77
KITopen (Karlsruhe Institute of Technologie)
76
Defense Technical Information Center: DTIC Technical Reports database
63
University of Michigan: Digital Collections
62
Bavarian Digital Repository (BDR - Bayerische Staatsbibliothek Munich, BSB)
56
PANGAEA - Data Publisher for Earth & Environmental Science
43
Washington Rural Heritage (Washington State Library)
43
Washington State Library: Digital Collections and Resources
43
Digital Repository of Scientific Institutes (RCIN)
42
NOAA NCEI Environmental Data Archive (via DataONE)
42
University of Washington, Seattle: Digital Collections
40
The Portal to Texas History (University of North Texas)
39
Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen)
29
Harvard University: Harvard Collections
29
University of Calgary Journal Hosting
26
University of Florida: Digital Library Center
25
The Library of Congress: American Memory
24
National Library of Australia: Digital Collections
22
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
22
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
21
Cambridge University Press
20
Texas Tech University: TTU DSpace Repository
20
Doria (National Library of Finland)
19
Theseus.fi (Open Repository of the Universities of Applied Sciences)
19
Washington State University: WSU Libraries Digital Collections
18
York University Digital Library
17
American Museum of Natural History: AMNH scientific publications
16
MDC - Memòria Digital de Cataluny
16
OpenEdition
14
University of Tromsø: Septentrio Academic Publishing
14
Arca (BC's Digital Treasures)
13
MDPI Open Access Publishing
13
Umeå University: Publications (DiVA)
13
APS Digital Library (American Philosophical Society)
12
Charles University CU Digital repository
12
CyberLeninka (Scientific Electronic Library)
12
Delaware Heritage Collection
12
more ...