German art of the twentieth century [Museum of Modern Art, New York, 1. October - 8. December 1957 ; City Art Museum, Saint Louis, 8. January - 24. February 1958] - Haftmann, Werner 1912-1999; Hentzen, Alfred 1903-1984; Lieberman, William Slattery 1924-2005 (Museum of Modern Art, 1957)