| John Heartfield The Voice of Freedom in the German Night on Radio Wave 29.8 [From Die Volks-Illustrierte (April 21, 1937), no. 16, p. 245] 1937 Copper-plate photogravure J. Paul Getty Museum © 2006 Artists Rights Society (ARS), New York / VG Bild-Kunst, Bonn (The Getty Research Institute, Research Library, 87-S497) LL/8471
| |