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LeibnizOpen (The Leibniz Association)
20
Unknown
2
Copernicus Publications: E-Journals
1
German Aerospace Center: elib - DLR electronic library
1
Natural Environment Research Council: NERC Open Research Archive
1
Niedersächsisches Online-Archiv NOA
1
Renate - Repositorium für Naturwissenschaften und Technik (TIB Hannover)
1
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