Content Provider
WikiBooks - Open-content textbooks
36
Cambridge University Press
16
Biodiversity Heritage Library (BHL)
14
Unknown
13
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
11
UNESDOC - UNESCO Digital Library
7
Australian National University: ANU Digital Collections
4
Lund University Publications (LUP)
4
Oxford University Press (via Crossref)
4
Arctic Portal Library
3
JSTOR
3
University of North Texas: UNT Digital Library
3
Aarhus University: Research
2
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
2
De Gruyter
2
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
2
Springer Nature
2
The University of Queensland: UQ eSpace
2
Yale University Press
2
Zenodo
2
CEDA document repository (Centre for Environmental Data Analysis)
1
Digital.CSIC (Spanish National Research Council)
1
Discovery - University of Dundee Online Publications
1
Duke University Press
1
EconStor (German National Library of Economics, ZBW)
1
Expeditio - Repositorio Institucional Universidad de Bogotá Jorge Tadeo Lozano (UTADEO)
1
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
1
Frontiers (Publisher)
1
GEO-LEOe-docs (FID GEO)
1
Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto
1
IIASA DARE (Data Repository of the International Institute of Applied Systems Analysis)
1
IIASA PURE (International Institute of Applied Systems Analysis: PUblications REpository)
1
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
1
IRUA - Institutional Repository van de Universiteit Antwerpen
1
Maynooth University ePrints and eTheses Archive (National University of Ireland)
1
Middlesex University London: Research Repository
1
Open Research Library
1
Publication Server of Goethe University Frankfurt am Main
1
RePEc (Research Papers in Economics)
1
Springer Nature (via Crossref)
1
St. Mary's University College Twickenham, London: Open Research Archive
1
The University of Manchester: Research Explorer
1
University of Alberta: Era - Education and Research Archive
1
University of Bristol: Bristol Research
1
University of Groningen research database
1
University of Southampton: e-Prints Soton
1
Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca)
1
eCite UTAS (University of Tasmania)
1
norden (Nordic Council of Ministers): Publications (DiVA)
1