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Batty, Robert ; Wallis, RobertIn: Scenery of the Rhine, Belgium and Holland, Proofs and Etchings, Vol. ILondon : Jennings, 1826[Drachenfels And Rolands-Eck]
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Teichgräber, Heinrich WilhelmIn: Borussia : Museum für preussische Vaterlandskunde, 3 (1842)Jg. III.18 H. B.III1842