Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
29
Biodiversity Heritage Library (BHL)
13
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
8
Eberhard Karls University Tübingen: Publication System
7
Dresden University of Technology: Qucosa
5
ETH Zürich Research Collection
5
OPUS - Publication Server of the University of Stuttgart
5
Unknown
5
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
3
Publication Server of Goethe University Frankfurt am Main
3
Bavarian Digital Repository (BDR - Bayerische Staatsbibliothek Munich, BSB)
2
Directory of Open Access Journals: DOAJ Articles
2
International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons
2
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
2
Project Gutenberg (PG)
2
Forum: Qualitative Social Research
1
Frankfurt/Main University Library: Digitale Sammlungen
1
GEO-LEOe-docs (FID GEO)
1
Georg-August-Universität Göttingen: GoeScholar
1
MACAU: Open Access Repository of Kiel University
1
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen)
1
Norsk Polarinstitutt: Brage NP
1
Norwegian Polar Institute: Brage NP
1
Publication Server of Tier University (OPUS)
1
TU Wien: reposiTUm
1
Technical University of Denmark: DTU Orbit
1
ediss.sub.hamburg (Staats- und Universitätsbibliothek Hamburg, Carl von Ossietzky)
1