Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
367
Unknown
332
PANGAEA - Data Publisher for Earth & Environmental Science
292
University of Lethbridge Digitized Collections
230
Canadian Science Publishing (via Crossref)
229
University of Calgary Journal Hosting
187
Directory of Open Access Journals: DOAJ Articles
180
ScienceDirect (Elsevier - via Crossref)
119
MSpace at the University of Manitoba
116
Wiley Online Library (via Crossref)
99
Cambridge University Press
96
Theses Canada/Thèses Canada (Library and Archives Canada)
93
Hathi Trust Digital Library
79
APS Digital Library (American Philosophical Society)
75
Springer Nature (via Crossref)
72
Biodiversity Heritage Library (BHL)
67
Wiley Online Library
65
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
61
Washington State University: WSU Libraries Digital Collections
60
Copernicus Publications: E-Journals
58
University of Michigan: Digital Collections
56
PubMed Central (PMC)
53
WikiBooks - Open-content textbooks
50
Informa (via Crossref)
47
Canadian Science Publishing
45
Niedersächsisches Online-Archiv NOA
44
HighWire Press (Stanford University)
39
Defense Technical Information Center: DTIC Technical Reports database
35
Érudit.org (Université Montréal)
33
Université de Nantes: HAL-UNIV-NANTES
32
Cambridge University Press (via Crossref)
29
The University of Utah: J. Willard Marriott Digital Library
28
York University, Toronto: YorkSpace
28
Institut national des sciences de l'Univers: HAL-INSU
26
Hunter Library Digital Collections (Western Carolina University)
25
University of the Pacific, McGeorge School of Law: Scholarly Commons
23
University of the Pacific: Scholarly Commons
23
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
22
ScienceDirect (Elsevier)
22
York University Digital Library
22
The Canadian Field-Naturalist (E-Journal)
20
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
20
LeibnizOpen (The Leibniz Association)
19
University of New Brunswick: Centre for Digital Scholarship Journals
19
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
18
University of California Press (via Crossref)
18
Memorial University of Newfoundland: Research Repository
17
Oklahoma State University: Digital Collections @ OKSTATE Library
17
PRISM - University of Calgary Digital Repository
17
University of Alberta: Era - Education and Research Archive
17
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