Content Provider
Biodiversity Heritage Library (BHL)
347
Aarhus University: Research
203
University of Copenhagen: Research
180
Technical University of Denmark: DTU Orbit
151
WikiBooks - Open-content textbooks
123
Unknown
61
norden (Nordic Council of Ministers): Publications (DiVA)
52
Cambridge University Press
46
Aalborg University's Research Portal
44
OpenAgrar (OA)
26
RePEc (Research Papers in Economics)
24
University of Southern Denmark Research Portal
24
Roskilde University Research Portal (RUC)
20
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
19
UNESDOC - UNESCO Digital Library
17
University of Southampton: e-Prints Soton
13
American Museum of Natural History: AMNH scientific publications
12
Arctic Portal Library
12
Open Research Library
12
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
10
Oxford University Press (via Crossref)
10
Uppsala University: Publications (DiVA)
10
David Rumsey Historical Map Collection (Cartography Associates)
9
Informa (via Crossref)
8
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
5
Architecture, Design and Conservation - Danish Portal for Artistic and Scientific Research: Research Outputs
5
IIASA DARE (Data Repository of the International Institute of Applied Systems Analysis)
5
IIASA PURE (International Institute of Applied Systems Analysis: PUblications REpository)
5
Kiel University Library: Digital Collections
5
Springer Nature
5
Université de Nantes: HAL-UNIV-NANTES
5
CEDA document repository (Centre for Environmental Data Analysis)
4
DataCite Metadata Store (German National Library of Science and Technology)
4
Falmouth University Research Repository (FURR)
4
GEO-LEOe-docs (FID GEO)
4
Marine Institute Open Access Repository
4
OECD iLibrary (via Crossref)
4
Texas A&M University Digital Repository
4
USRA Houston Repository (Universities Space Research Association)
4
University of the Highlands and Islands: Research Database of UHI
4
De Gruyter
3
ETH Zürich Research Collection
3
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
3
International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons
3
LaCRIS - University of Lapland Current Research System
3
Repozytorium Uniwersytetu w Białymstoku (RUB)
3
SSOAR - Social Science Open Access Repository
3
Springer Nature (via Crossref)
3
ARPI - Archivio della Ricerca dell'Università di Pisa
2
Arctic Council Repository
2
more ...