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LeibnizOpen (The Leibniz Association)
19
Max Planck Society: MPG.PuRe
2
Unknown
2
Copernicus Publications: E-Journals
1
DataCite Metadata Store (German National Library of Science and Technology)
1
JPL Technical Report Server
1
Niedersächsisches Online-Archiv NOA
1
Renate - Repositorium für Naturwissenschaften und Technik (TIB Hannover)
1
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