Columbia subject headings:
Böll, Heinrich, 1917-1985.
Grass, Günter, 1927-2015--Political and social views.
Harvard subject headings:
Böll, Heinrich, 1917-1985--Political and social views.
Grass, Günter, 1927-2015--Political and social views.
Princeton subject headings:
Böll, Heinrich, 1917-1985--Political and social views.
Grass, Günter, 1927-2015--Political and social views.