Columbia subject headings:
Lenz, Siegfried, 1926-2014--Knowledge and learning.
Lenz, Siegfried, 1926-2014--Political and social views.
Literature.
Harvard subject headings:
Lenz, Siegfried, 1926---Knowledge--Literature.
Lenz, Siegfried, 1926---Political and social views.
Lenz, Siegfried, 1926-2014--Knowledge--Literature.
Lenz, Siegfried, 1926-2014--Political and social views.
Princeton subject headings:
Lenz, Siegfried, 1926-2014--Knowledge--Literature.
Lenz, Siegfried, 1926-2014--Political and social views.