Content Provider
Cambridge University Press
2,376
ScienceDirect (Elsevier - via Crossref)
689
ScienceDirect (Elsevier)
622
University of California Press (via Crossref)
108
University of California Press
82
DataCite Metadata Store (German National Library of Science and Technology)
46
University of California: eScholarship
35
LeibnizOpen (The Leibniz Association)
26
Old Dominion University: ODU Digital Commons
19
Wiley Online Library
17
David Rumsey Historical Map Collection (Cartography Associates)
14
Directory of Open Access Journals: DOAJ Articles
14
Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences)
13
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository
10
Unknown
9
Cambridge University Press (via Crossref)
8
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR
7
DRO - Deakin Research Online
6
University of Liège: ORBi (Open Repository and Bibliography)
5
Ghent University Academic Bibliography
4
Griffith University: Griffith Research Online
4
Institute of Earth Environment: IEECAS OpenIR (Chinese Academy of Sciences)
4
The University of Queensland: UQ eSpace
4
University College London: UCL Discovery
4
University of Calgary Journal Hosting
4
Università degli Studi di Ferrara: CINECA IRIS
4
Utrecht University Repository
4
Australian National University: ANU Digital Collections
3
DIAL@UCLouvain (Université catholique de Louvain)
3
DIAL@USL-B (Université Saint-Louis, Bruxelles)
3
Digital Repository @ Iowa State University
3
Guangzhou Institute of Geochemistry: GIG OpenIR (Chinese Academy of Sciences)
3
Imperial College London: Spiral
3
Lund University Publications (LUP)
3
OhioLINK: Electronic Theses and Dissertations Center
3
PUBLISSO Fachrepositorium Lebenswissenschaften (ZB MED)
3
San José State University: SJSU ScholarWorks
3
Texas A&M University Digital Repository
3
University of Massachusetts: ScholarWorks@UMass Amherst
3
W&M ScholarWorks
3
Zenodo
3
Aberdeen University Research Archive (AURA)
2
Biodiversity Heritage Library (BHL)
2
Central Washington University: ScholarWorks
2
Hathi Trust Digital Library
2
IRIS Università degli Studi di Bologna (CRIS - Current Research Information System)
2
Queen's University Belfast Research Portal
2
Stockholm University: Publications (DiVA)
2
Texas Tech University: TTU DSpace Repository
2
University at Albany, State University of New York (SUNY): Scholars Archive
2
more ...