Content Provider
Cambridge University Press
55
Hathi Trust Digital Library
34
Biodiversity Heritage Library (BHL)
30
Unknown
21
DataCite Metadata Store (German National Library of Science and Technology)
17
Directory of Open Access Journals: DOAJ Articles
9
Bavarian Digital Repository (BDR - Bayerische Staatsbibliothek Munich, BSB)
5
David Rumsey Historical Map Collection (Cartography Associates)
5
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
4
National Library of Australia: Digital Collections
4
The University of Melbourne: Digitised Collections
4
University of Calgary Journal Hosting
4
Université de Nantes: HAL-UNIV-NANTES
4
Harvard University: Harvard Collections
3
OpenEdition
3
University of Miami: Digital Collections
3
Arctic Institute of North America (via Crossref)
2
English Heritage ViewFinder
2
JSTOR (via Crossref)
2
National Research Council Canada: NRC Publications Archive
2
Oxford University Press (via Crossref)
2
Polar Research (E-Journal)
2
RePEc (Research Papers in Economics)
2
SAGE Publications (via Crossref)
2
Aarhus University: OJS at The State and University Library
1
Apollo - University of Cambridge Repository
1
Arcadia - Explorations in Environmental History (E-Journal)
1
Canadian Science Publishing (via Crossref)
1
Carleton University's Institutional Repository
1
Center for Jewish History: Digital Collections
1
Charles University CU Digital repository
1
Copernicus Publications: E-Journals
1
Durham University: Durham Research Online
1
Gallica - bibliothèque numérique de la Bibliothèque nationale de France (BnF)
1
Georg-August-Universität Göttingen: GOEDOC
1
HAL Clermont Auvergne (Université Blaise Pascal Clermont-Ferrand/Université d'Auvergne)
1
Hacettepe University Institutional Repository
1
Hrčak - Portal of scientific journals of Croatia
1
Informa (via Crossref)
1
Kedge Business School: HAL
1
Kitami Institute of Technology Repository (KIT-R)
1
LaCRIS - University of Lapland Current Research System
1
Maine State Documents (Maine State Library)
1
Memorial University of Newfoundland: Research Repository
1
Murdoch University: Murdoch Research Repository
1
NORA (National aggregator of open repositories of Russian universities)
1
Niedersächsisches Online-Archiv NOA
1
Plymouth Marine Science Electronic Archive (PlyMSEA - Plymouth Marine Laboratory, PML)
1
Queen's University Belfast Research Portal
1
Repository of the University of Rijeka
1
more ...