Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
2
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
2
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
1
GEO-LEOe-docs (FID GEO)
1
Niedersächsisches Online-Archiv NOA
1