![](../assets/images/LogoDroste.jpg)
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Droste-Verlag
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![](../assets/images/hhilogo.jpg)
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Theatermuseum/ Dumont-Lindemann- Archiv Düsseldorf
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Stiftung Museum Kunstpalast
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Städtischer Musikverein zu Düsseldorf
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Künstlerverein Malkasten
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“Immermann im Internet” - Immermann- Gesellschaft
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Heinrich-Heine- Institut Düsseldorf
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Felix Mendelssohn Bartholdy Portal Leipzig
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Stadtarchiv Düsseldorf
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Digitale Sammlungen Download Bücher, Theaterzettel u.v.m.
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