Content Provider
Directory of Open Access Journals: DOAJ Articles
8,329
ScienceDirect (Elsevier - via Crossref)
3,807
ScienceDirect (Elsevier)
2,022
Cambridge University Press
1,845
DataCite
1,199
Informa (via Crossref)
643
Open Parks Network
634
Lund University Publications (LUP)
580
Defense Technical Information Center: DTIC Technical Reports database
372
eCite UTAS (University of Tasmania)
342
Springer Nature (via Crossref)
337
Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences)
265
Institute of Earth Environment: IEECAS OpenIR (Chinese Academy of Sciences)
228
Biodiversity Heritage Library (BHL)
180
University of Chicago Press (via Crossref)
159
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
139
DataCite Metadata Store (German National Library of Science and Technology)
135
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR
131
Hathi Trust Digital Library
116
OhioLINK: Electronic Theses and Dissertations Center
109
Columbia University: Academic Commons
99
Uppsala University: Publications (DiVA)
98
Guangzhou Institute of Geochemistry: GIG OpenIR (Chinese Academy of Sciences)
92
University of Leicester: Leicester Research Archive (LRA)
92
University of North Texas: UNT Digital Library
87
Luleå University of Technology Publications (DiVA)
84
PRISM - University of Calgary Digital Repository
77
Informa
69
University of California: eScholarship
68
IMHE OpenIR (Institute of Mountain Hazards and Environment, Chinese Academy of Sciences)
66
Wiley Online Library (via Crossref)
64
University of Michigan: Digital Collections
54
Rice University: Digital Scholarship Archive
53
Wiley Online Library
47
Theses Canada/Thèses Canada (Library and Archives Canada)
42
University of Calgary Journal Hosting
39
University College London: UCL Discovery
38
Stockholm University: Publications (DiVA)
37
The College of Wooster: Open Works
37
University of Copenhagen: Research
37
Imperial College London: Spiral
36
University of California Press (via Crossref)
36
Western Washington University: CEDAR (Contributing to Education through Digital Access to Research)
34
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository
31
Swedish Museum of Natural History: Publications (DiVA)
31
The University of Western Ontario: Scholarship@Western
31
The University of Adelaide: Digital Library
30
LeibnizOpen (The Leibniz Association)
29
DIAL@USL-B (Université Saint-Louis, Bruxelles)
28
Utrecht University Repository
28
more ...