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German Sales 1901-1929. Bibliographie der Auktionskataloge aus Deutschland, Österreich und der Schweiz
ART-Dok (Virtual Library for Art, Heidelberg University), 2019
BASE - Bielefeld Academic Search Engine , ART-Dok (Virtual Library for Art, Heidelberg University)
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German Sales 1930 – 1945. Bibliographie der Auktionskataloge aus Deutschland, Österreich und der Schweiz.
ART-Dok (Virtual Library for Art, Heidelberg University), 2013
BASE - Bielefeld Academic Search Engine , ART-Dok (Virtual Library for Art, Heidelberg University)
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Dal castello di caccia al "Lusthaus" cinquecentesco : la Maison des Champs nell’ambiente austro-germanico
BASE - Bielefeld Academic Search Engine , ART-Dok (Virtual Library for Art, Heidelberg University)
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Architektur zur Zeit des Dreissigjährigen Krieges: Kirchen und Schlösser im deutschsprachigen Raum
BASE - Bielefeld Academic Search Engine , ART-Dok (Virtual Library for Art, Heidelberg University)
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Architecture at the time of the Thirty Years' War: churches and castles in the German-speaking countries
BASE - Bielefeld Academic Search Engine , ART-Dok (Virtual Library for Art, Heidelberg University)
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Stile und Regionen: Malerei und Glasmalerei
BASE - Bielefeld Academic Search Engine , ART-Dok (Virtual Library for Art, Heidelberg University)