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Bavarian Digital Repository (BDR - Bayerische Staatsbibliothek Munich, BSB)
1
DIAL@USL-B (Université Saint-Louis, Bruxelles)
1
DataCite Metadata Store (German National Library of Science and Technology)
1
Frankfurt/Main University Library: Digitale Sammlungen
1
Hathi Trust Digital Library
1
University of Michigan: Digital Collections
1
dilibri (Landesbibliothekszentrum Rhineland-Palatinate)
1
e-rara.ch (ETH Zürich)
1
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