German), vol. 55, Leipzig: Duncker & Humblot, pp. 184–194 Biography, by Heinz Ladendorf, 1935 Article in Morgenpost newspaper dhm.de: Schlüter bio at Zeughaus...
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2011-08-09 at the Wayback Machine Walter de Gruyter GmbH.[dead link] Heinz Ladendorf, "Das Allgemeine Lexikon der bildenden Künstler Thieme-Becker-Vollmer...
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Pucelle to Bruegel. Holt, Rinehart and Winston, Inc. ISBN 0-03-072500-3 Ladendorf, Heinz (1966), "Grünewald, Matthias", Neue Deutsche Biographie (in German)...
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pp.27–33. Otto Baur, Alfred Kirfel, Margot Klütsch, Dirk Kocks and Heinz Ladendorf: Fritz v. Wille, der Maler der Eifel. Exhibition catalog, Daun 1979...
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