Columbia subject headings:
Böll, Heinrich, 1917-1985--Appreciation--United States.
Grass, Günter, 1927-2015--Appreciation--United States.
Harvard subject headings:
Böll, Heinrich, 1917-1985--Appreciation--United States.
Grass, Günter, 1927-2015--Appreciation--United States.
Princeton subject headings:
Böll, Heinrich, 1917-1985--Appreciation--United States.
Grass, Günter, 1927-2015--Appreciation--United States.