Content Provider
LeibnizOpen (The Leibniz Association)
20
Unknown
2
DataCite Metadata Store (German National Library of Science and Technology)
1
ETH Zürich Research Collection
1
Natural Environment Research Council: NERC Open Research Archive
1
Niedersächsisches Online-Archiv NOA
1
Renate - Repositorium für Naturwissenschaften und Technik (TIB Hannover)
1