Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
37
PANGAEA - Data Publisher for Earth & Environmental Science
37
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
2
Copernicus Publications: E-Journals
1
Ghent University Academic Bibliography
1
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen)
1
Niedersächsisches Online-Archiv NOA
1