Content Provider
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
49
International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons
45
WikiBooks - Open-content textbooks
32
OpenAgrar (OA)
23
DataCite Metadata Store (German National Library of Science and Technology)
10
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
6
Springer Nature (via Crossref)
6
Bern University of Applied Sciences: ARBOR
1
De Gruyter (via Crossref)
1
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
1
Publication Server of Goethe University Frankfurt am Main
1
ULB Düsseldorf: Digitale Sammlungen (University Library of Düsseldorf University)
1
Universität Leipzig: Qucosa
1
ediss.sub.hamburg (Staats- und Universitätsbibliothek Hamburg, Carl von Ossietzky)
1