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Reparatur neugotischer Wohnhäuser in Hannover
Eldorado - Repositorium der TU Dortmund, 2019-01-01
BASE - Bielefeld Academic Search Engine , Eldorado - Repositorium der TU Dortmund
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Kurt Schwitters' Merzbau
ART-Dok (Virtual Library for Art, Heidelberg University), 2007
BASE - Bielefeld Academic Search Engine , ART-Dok (Virtual Library for Art, Heidelberg University)